Race Calendar

Region:

May 2025

Date Event Distance Location Description
05/17/2025 13 Mile Trail Race Top Down 13.1M San Jose, CA The course is point to point. It will be marked with single solid PINK color ribbons tied to clothespins, ORANGE cones, signs and gypsum.
05/17/2025 Bishop High Sierra Ultras 100K, 50M, 55K, 20M, 6K Bishop, CA These are high altitude races, with lots of climbing, in the scenic foothills of the Eastern Sierra Nevada.
05/17/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am. Please come along and join us whatever your pace!
05/17/2025 Campus Life 5K 5K Fresno, CA This 5k + Kids Fun Run is for the whole family to enjoy!
05/17/2025 Girls on the Run - Silicon Valley 5K Los Gatos, CA Join us for our 5K Celebration at Vasona Park. Our event is about accomplishing a goal and is not timed!
05/17/2025 Leigh Longhorn Stampede 5K San Jose, CA Join us for a 5K event through Cambrian neighborhood. Whether you are a walker , a casual jogger, distance runner or just want to cheer on the participants come be a part of our community.
05/17/2025 Luc's Run 10K, 2M Tuolumne, CA The scenic race route starts in a community of cheering local residents and proceeds through peaceful pastures with a challenging uphill climb through the historic streets of Tuolumne city.
05/17/2025 Mud Factor - Sacramento 5K Sacramento, CA The Mud Factor is a seriously fun 5K Obstacle Run! Giant Cargo Climbs, Water Slides, Epic Mud Crawls and Kidz Family Waves, too!
05/17/2025 Napa Wilderness Trail Runs 40M, 50K, 30K, 13.1M, 10K Napa, CA Napa Wilderness Trail Runs at Skyline Park will offer a wide range of trail runs from Ultra distance to a 10k for new trail runners or folks just getting back to the trails.
05/17/2025 Pacifica Foothillls Trail Run 30K, 113.1M, 10K Pacifica, CA This event takes place in the San Pedro Valley Park in the surf town of Pacifica. It offers acres and acres of coastal mountain environment.
05/17/2025 Run for Amma 50K, 30K, 10K Los Gatos, CA The Run for Amma is an annual event to help raise awareness and money to aid in cutting edge research and treatments for cancer.
05/17/2025 Trail Quake Half Marathon 13.1M, 10K, 5K Saratoga, CA The woods are calling! Run through the Redwoods and Pines and say hello to banana slugs! Put you ear to the ground and you can hear distant rumbling.
05/21/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
05/24/2025 Armed Forces Half Marathon 13.1M Concord, CA Runners will get an incredible panoramic view of the installation. This part of the course up until now has been strictly off-limits to civilians.
05/24/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Parkrun is a free, fun and friendly weekly 5K community event. The run starts at 8am. Please come along and join us whatever your pace!
05/24/2025 Modesto Memorial Classic 5K, 1M Modesto, CA Both courses are scenic, shady loops and are walker friendly. Bring the kids along for the FREE kid's fun run. Pancake breakfast included with paid registration
05/24/2025 Placerville Path Memorial Day Run 13.1M, 15K, 10K, 5K Placerville, CA This race on the El Dorado Trail in Placerville is held rain or shine. The path is surrounded with beautiful oak trees, rolling hills and incredible views.
05/24/2025 Western States Memorial Weekend Training Runs 70M Over the Memorial Day weekend Western States offers three training runs to acquaint runners with the last 70 miles of the Western States course.
05/25/2025 LMJS 4th Sunday Runs 15K, 10K, 5K Oakland, CA Distances offered at these races are 5K (once around the lake), 10K (twice around the lake) and 15K (three times around the lake).
05/25/2025 Tilden Tough Ten 10M Berkeley, CA Get ready for the race of a lifetime! A fun and challenging ten mile race in the beautiful Tilden Regional Park that'll test your mettle on both road and trail, with some real lung busting hills.
05/27/2025 Yosemite Valley Views 6 Day Stage 90M Yosemite, CA There is no better way for an endurance athlete to experience what this wilderness park has to offer.
05/28/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
05/31/2025 Bakersfield Hot Fudge Sundae Run 5K 5K Bakersfield, CA Run a 5K or walk our 2K and earn your hot fudge sundae. Want a little more fun? Join or create a Sundae Team!
05/31/2025 Beer City Half 13.1M, 10K, 5K San Jose, CA Join us at Almaden Lake Park for a running and beer celebration with fine regional beers and kombucha to taste at the finish.
05/31/2025 Big River Adventure 10K, 5K Mendocino, CA Join us for a unique race experience where you can choose your adventure to run, swim, walk, or paddle your way through the scenic beauty of Mendocino County's Big River.
05/31/2025 Byxbee parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
05/31/2025 Calero Trail Run 50K, 25K, 13.1M, 15K, 10K, 5K San Jose, CA Beginning at Calero County Park, this trail run has everything! Experience awesome single track, great hills, and dirt paths.
05/31/2025 Monterey Spartan Super 10K 10K Salinas, CA There’s nothing mediocre about this middle distance race. The Spartan Super offers the ideal blend between distance and speed.
05/31/2025 Rainbow Run 5K 5K Visalia, CA Celebrate Pride Month with the Rainbow Run presented by The Source LGBT+ Center! Join forces with family, friends and colleagues to amplify the fun and impact of the Rainbow Run.
05/31/2025 San Jose Half Marathon 13.1M, 8K San Jose, CA Enjoy a flat and fast half marathon course or an 8K, with both courses including the Mariachi Mile!
05/31/2025 Sonoma Coast Trail Run 50K, 26.2M, 30K, 13.1M Duncan Mills, CA Presented by SkyBreaker Racing, Sonoma Coast Trail Runs take place on the beautiful trails and fire roads of Sonoma Coast State Park on Northern California's beautiful coastline.
05/31/2025 Wildcat Half Marathon 13.1M, 10K, 5K El Sobrante, CA Plan your weekend and pack your camera! Hills and more hills! Views of San Francisco, the Golden Gate Bridge, Alcatraz, Mount Tamalpais, the Bay and the ocean await you!

June 2025

Date Event Distance Location Description
06/01/2025 Cinderella Trail Run 50K, 26.2M, 30K, 13.1M, 5M Oakland, CA The course travels through beautiful Redwood Regional Park.
06/01/2025 Hot Fudge Sundae Run 5K Fresno, CA Run or Walk our 5k or 2m courses and earn your Hot Fudge Sundae! Want a little more fun?
06/01/2025 Lake Chabot Trail Challenge 13.1M, 5K Castro Valley, CA The half marathon course is a scenic, hilly loop, mainly on dirt fire roads.
06/01/2025 Lighthouse 5K 5K Santa Margarita, CA Get ready to lace up your running shoes and join us for a fun-filled event that’s all about making a positive impact in our community!
06/01/2025 Pioneer Day Fun Run 5K Meadow Vista, CA A 5k Fun Run and Walk through Meadow Vista to kick off Pioneer Day and help support the Colfax High School Cross Country Team! Let's get our summer started!!!
06/01/2025 Spartan Trail - Monterey 50K, 13.1M, 10K Salinas, CA This race is held within a classic Spartan OCR festival weekend.
06/01/2025 Statuto Race 8K San Francisco, CA The Statuto Race commemorates the creation of the first Italian Constitution (Statuto Albertino) and is a running tradition in San Francisco.
06/01/2025 Tail Wagger 5K 5K, 1M Tahoe Vista, CA The Tail Wagger 5K and 1 Mile course feature the trails at the North Tahoe Regional Park.
06/01/2025 Women's Fitness Festival 10K, 5K Sacramento, CA This is a one-of-a-kind all women’s event that includes medals and a beautiful race tee for 5K/10K finishers.
06/04/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
06/06/2025 USS Hornet Twilight 5K 5K Alameda, CA Join us for a unique evening run around beautiful Alameda Point. Runners will start and finish under the historic USS Hornet museum.
06/07/2025 Byxbee parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/07/2025 China Camp Trail Run 13.1M, 10K, 5K San Rafael, CA An extensive trail network will greet you with views of Mt. Tam, San Pablo Bay, and San Francisco Bay as you traverse twisting single-track trails, climbing up and over the peak.
06/07/2025 DeCelle Memorial Lake Tahoe Relay 72M South Lake Tahoe, CA The Lake Tahoe Relay teams consist of 7 people, each running approximately 8 to 12 miles.
06/07/2025 Impala Stampede 5K San Francisco, CA The Impala Stampede is a fun and exciting 5K/Kids’ Mile/Tots’ 400m race* that the Impalas hold in Golden Gate Park every spring.
06/07/2025 Mt. Umunhum Ultras 100K, 50M, 50K, 26.2M, 30K, 13.1M, 9M, 10K, 5K San Jose, CA It is with great excitement that we present the trail running community with an exclusive trail racing event – the Mt. Umunhum Ultras!
06/07/2025 Poverello House Run for Meals 5K, 2M Fresno, CA Join us at Woodward Park at Sunset View Shelter to support the work Poverello House provides to those in need.
06/07/2025 Redding Health Expo Run 5K Redding, CA Start line is on the west side of civic on road.
06/07/2025 SF Half Day 24H, 12H, 6H, 30M San Francisco, CA Run as far as you can or as little as you want. Sign up individually or as a team!
06/08/2025 City Beer Runs - Fort Point Valencia 5K, 10K San Francisco, CA Join us at Fort Point Beer Company's Valencia Street location! Our brewery runs start at a local brew house and work their way through city streets before ending back at the host watering hole for a post run social and raffle! Save $5 with coupon code SWEAT
06/08/2025 Dashing for Donuts 5K El Dorado, CA The race will be on a paved trail and downhill to the middle of the Weber Creek Bridge and then you go back up. Once you're finished, you get a donut and a medal.
06/08/2025 Dipsea Race 7.4M Mill Valley, CA First run in 1905, the Dipsea is the oldest trail race in America. It is run every year on the second Sunday in June.
06/08/2025 Presidio Wall 5K 5K San Francisco, CA Start and finish on the grass lawn adjacent to Presidio Wall Playground.
06/08/2025 VI TRI 5K Run 5K Visalia, CA Come out and have some fun!
06/11/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
06/13/2025 Tahoe 200 200M Lake Tahoe, CA The Tahoe 200 is an incredible journey around the largest alpine lake in North America.
06/14/2025 Byxbee parkrun 5K Palo Alto, CA Every Saturday at 8:00am.
06/14/2025 Cool Moon Trail Runs 100M, 100K, 50M, 25M Cool, CA The Heat 100-Mile Endurance Run of Northern California.
06/14/2025 Juneteenth Freedom Run/Walk 5K, 2.5M Fresno, CA The Juneteenth Freedom 5K/5 Mile Run is an event that goes beyond just a race.
06/14/2025 Muddy Dash - Sacramento 5K Sacramento, CA You can generally expect a couple of miles of mud, walls, ropes, monkey bars, and multiple other examples of anything we are able to fit into the unique terrain of each venue we visit.
06/14/2025 Olympic Valley Half Marathon 13.1M, 8M Olympic Valley, CA This is great course featuring epic valley and peak views and the Truckee River corridor. Start and Finish in the Village At Palisades Tahoe.
06/15/2025 Father's Day Rainbow Falls 5K 5K San Francisco, CA Start/Finish: JFK Dr. & Transverse Dr.
06/15/2025 Father's Day Run 10K, 2M Fresno, CA Please join us for our annual FATHER'S Day Run to honor your Dad! Lets celebrate ALL dads! Run our 10k or 2 mile run/walk.
06/15/2025 Paul Anderson Memorial 5K 5K Bakersfield, CA This event is in remembrance of our friend Paul Anderson (Andy Noise).
06/18/2025 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neighborhood and the Presidio.
06/21/2025 Angel Island 13.1M, 5M Marin County, CA Come join us and be a part of this event in a hidden gem right around the corner from everyone in the Bay Area.
06/21/2025 Bizz Johnson's Southside Scramble 22K, 14K, 7K Susanville, CA This amazing new trail race showcases the best of the Susan River Canyon!
06/21/2025 Byxbee parkrun 5K Palo Alto, CA TBD. Every Saturday at 8:00am.
06/21/2025 Golden State Trail Run 50K, 35K, 13.1M, 10K Monterey, CA The Golden State 50K/35K/Half Marathon/10K is our premier summer event, traversing the fabulous trails of Fort Ord National Monument.
06/21/2025 Headwaters Trail Run 56K, 31K, 10K Mount Shasta, CA These three scenic trail runs are named after the headwaters of the Sacramento River.
06/21/2025 San Francisco FrontRunners Pride Run 10K, 5K San Francisco, CA TBD. Our annual Pride Run which features a 5K, 10K, and Kids’ Dash, is an exciting, healthy, and family friendly way for us to engage with our community during Pride Month and raise money for a local beneficiary that aligns with our mission.
06/21/2025 Silicon Valley PRIDE 5K 5K San Jose, CA A 5K, where you can walk, jog, run or sashay your way to the finish line.
06/22/2025 Huntington Lake Triathlon, 5k & 10k 10K, 5K Lakeshore, CA The Huntington Lake Triathlon is a fun and challenging race in an incredible location in Lakeshore, CA near the China Peak Resort.
06/22/2025 LMJS Fourth Sunday Race - June 5K, 10K, 5K Oakland, CA TBD. All of LMJS Fourth Sunday runs begin at 9:00 a.m. at Adams Point, just before the Sailboat House, rain or shine.
06/22/2025 Twin Peaks 4M 4M San Francisco, CA Challenging 4 mile loop around Twin Peaks with spectacular views.
06/25/2025 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
06/28/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Park Run takes place every Saturday at 8:00am. Please come along and join in whatever your pace!
06/28/2025 Stars and Strides 5K/10K 10K, 5K San Jose, CA Fun, family-friendly activities.
06/28/2025 Western States Endurance Run 100M Squaw Valley, CA TBD. The Western States 100-Mile Endurance Run is the world’s oldest and most prestigious 100-mile trail race.
06/29/2025 Burton Creek Trail Run 13.1M, 12K, 6K Tahoe City, CA The Burton Creek Trail Run takes place on a beautiful, fun and challenging trail system within Burton Creek State Park near Tahoe City, CA.
06/29/2025 Lindley Meadow 5K 5K San Francisco, CA Double 1.55-mile cross country loop traversing grass, dirt, trails.
06/29/2025 Mare Island Half Marathon 13.1M, 10K, 5K Vallejo, CA Our Half Marathon course will take you along the historic naval yard to the highest point of Mare Island for beautiful views of the Bay, Mt. Diablo, and Mt. Tamalpais.

July 2025

Date Event Distance Location Description
07/02/2025 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/04/2025 Alameda July 4th Parade R.A.C.E. 5K Alameda, CA Join us for a 5K run (3.1 mile) and walk through beautiful Alameda starting at 9:00AM, just before the historic 4th of July Parade.
07/04/2025 Bay 2 Bankers 10K, 5K San Francisco, CA We have yet another never-been-done-before mystery theme celebrating the classic vibes of San Francisco.
07/04/2025 Chester Classic 4th of July Fun Run 1M Chester, CA This is a one mile run/walk down Chester's historic Main Street. This event is open to participants of all ages and abilities.
07/04/2025 Folsom Firecracker 10K, 5K, 2M Folsom, CA Join us for the Annual Folsom Firecracker. It is a great way to kick off Independence Day.
07/04/2025 Great American Race 10K, 5K Visalia,CA Welcome to the annual Great American Race. Let's kick off the 4th of July with a run/walk and Costume Contest!
07/04/2025 Run to the Beach 10K, 5K Lake Tahoe, CA Run, walk or stroll the July 4th 5K or 10K course. Starting at the North Tahoe Regional Park the courses offer scenic and fun trails.
07/04/2025 Santa Cruz Firecracker 10K, 5K Santa Cruz, CA The race is always held on July 4th in the morning! What a great way to kick off a holiday celebration of our nation's Independence Day.
07/04/2025 Stars and Stripes 5K 5K Concord, CA Help make this 4th of July running party even better by inviting your friends, family and neighbors.
07/05/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Park Run takes place every Saturday at 8:00am. Please come along and join in whatever your pace!
07/05/2025 Rancho Hills Trail Run 50K, 24M, 13.1M, 9M, 10K, 5K, 1M Morgan Hill, CA Set in Rancho Canada del Oro Open Space Preserve the course is 60% dirt roads and 40% single track.
07/06/2025 Yosemite Tuolumne Meadow Run 98M, 40M Tuolumne, CA An impressive network of trails weaves seamlessly through high passes, topaz lakes and cascading rivers.
07/07/2025 Badwater 135 135M Lone Pine, CA Covering 135 miles non-stop from Death Valley to Mt. Whitney, CA, the STYR Labs Badwater® 135 is the most demanding and extreme running race offered anywhere on the planet.
07/09/2025 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/12/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Park Run takes place every Saturday at 8:00am. Please come along and join in whatever your pace!
07/12/2025 Davis Moonlight Race 10M, 10K, 5K Davis, CA This is a fun and festive evening event with an energetic atmosphere and great running/walking routes.
07/12/2025 Dirty Dozen and Half Dozen Endurance Run 12H, 6H, 3H Pinole, CA Join us at Point Pinole Regional Shoreline for a different kind of race! From 7:00 am to 7:00 pm, the running party won't stop with 12 hour, 6 hour and 3 hour races going on.
07/12/2025 Lookin' for a Cure 5K Palo Alto, CA Lace up your sneakers and make your mark in the fight against ocular melanoma! This heart-pumping event kicks off bright and early.
07/12/2025 Muir Woods Mountain Challenge 30K, 13.1M, 10K Stinson Beach, CA The Muir Woods Mountain Challenge (formerly Table Rock) is a true competition for event-experienced and novice mountain runners alike.
07/12/2025 Salt Point Trail Run 50K, 26K, 15K, 9K Jenner, CA The Salt Point Trail Run provides a festive atmosphere for all to celebrate. These pristine and historic trails should be on every trail runner and ultra-marathoner bucket list.
07/12/2025 San Lorenzo River Trail Run 50K, 26.2M, 30K, 13.1M, 10K Santa Cruz, CA Run through 300 foot tall, 1500 year-old Coastal Redwoods, lush stream canyons, open meadows, pine and oak forests, and high dry chaparral-covered ridges.
07/13/2025 Patagonia 5K 5K, 1M San Francisco, CA Join Patagonia San Francisco & Excelsior Running Club for a 5K around Blue Heron Lake. The rolling course runs through Golden Gate Park.
07/16/2025 Fog City Run 5K San Francisco, CA The Fog City Route is a hilly 5k (ish) run through the Marina Neightborhood and the Presidio.
07/19/2025 Bad Bass Half Marathon 13.1M, 10K, 5K Castro Valley, CA Whatever the Bad Bass is doing here, we hope you'll join us for fun at beautiful Lake Chabot Marina in Castro Valley.
07/19/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Park Run takes place every Saturday at 8:00am. Please come along and join in whatever your pace!
07/19/2025 Christmas in July 5K 5K Fresno, CA Run with Santa Claus down shaded Christmas Tree Lane in JULY! YEP!! HoHoHo! No Joke! Join Santa in July and see what he has in store for you!
07/19/2025 Napa to Sonoma Wine Country Rose 5K 5K Napa, CA Start your destination weekend off with a very special 5K on Saturday morning.
07/20/2025 Big Chief 50K 50K Truckee, CA The Big Chief 50K trail race is a loop course on a mix of single track and fire roads in the scenic forests between Lake Tahoe and Truckee.
07/20/2025 Blood, Sweat & Beers 10.5M, 5.9M Auburn, CA The Blood, Sweat and Beers Trail Run is nestled in the American River Canyon. The course has rocks, roots, lot’s of dirt, hills, and wildlife.
07/20/2025 Napa to Sonoma Wine Country Half Marathon 13.1M Napa, CA This popular race features a fast and scenic course starting at the winery and finishing in historic Sonoma Plaza.
07/20/2025 Tahoe Trail Run 50K, 10K Tahoe, CA Each race option offers stunning views, rocky summits and breathtaking pine forests in every direction.
07/23/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
07/26/2025 Byxbee Park Run 5K Palo Alto, CA Byxbee Park Run takes place every Saturday at 8:00am. Please come along and join in whatever your pace!
07/26/2025 Calero Hills Trail Fest 26.2M, 30K, 133.1M, 10M, 10K, 5K San Jose, CA This trail has everything! Experience awesome single track, great hills and dirt paths.
07/26/2025 Lost Sierra Endurance Race 100K, 50K, 25K Downieville, CA This is a thrilling endurance experience set against the stunning backdrop of the Sierra Buttes in Downieville.
07/26/2025 Miguel Reyes Elite Fun 5K 5K Fresno, CA A FUN competitive race in memory of a great person, runner and friend, Miguel Reyes from Fresno. Join his family, friends and coworkers in the 5K.
07/26/2025 San Francisco 5K 5K San Francisco, CA The 5K Waterfront Race features a flat, fast course that is perfect for racing with friends or walking with a stroller or family dog.
07/26/2025 San Francisco Ultramarathon 52.4M San Francisco, CA Running two marathons in San Francisco is a challege for the bold. Along the way you will take in breathtaking views of the Golden Gate Bridge, the San Francisco Bay anf Fisherman's Wharf .
07/26/2025 The Great Shasta Rail Trail 50K, 30K, 10K McCloud, CA This is a relatively flat course with very nice footing. All distances are out and back. Beautiful crisp mountain air surrounds incredible views.
07/27/2025 LMJS Fourth Sunday Race - July 15K, 10K, 5K Oakland, CA The Fourth Sunday Runs are held every month (except March and June) on the fourth Sunday of the month.
07/27/2025 Pear Fair Run 10M, 5M Courtland, CA Join us on the last Saturday of July at the Pear Fair! We want you to celebrate the Bartlett Pear Harvest by running with us!
07/27/2025 San Francisco Marathon 26.2M, 13.1M, 5K San Francisco, CA A running tour of everything San Francisco - Fisherman's Wharf, Golden Gate Bridge and Park, Haight Street, The Mission and AT&T Park.
07/30/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.

August 2025

Date Event Distance Location Description
08/02/2025 Byxbee parkrun 5K Palo Alto, CA It is a 5km run - it's you against the clock.
08/02/2025 Guadalupe River Find-Your-Way 5K, 10K 10K, 5K San Jose, CA Choose between a 5K and 10K challenge where you find up to 30 checkpoints.
08/02/2025 Hell of a Half Marathon 13.1M Exeter, CA Yes the course is challenging, the weather is hot, but what else would you expect at The Hell of Half Marathon?
08/02/2025 Point Mariah Trail Marathon 26.2M Soda Springs, CA Point Mariah offers expansive views of the Granite Chief Wilderness, the Pacific Crest Trail.
08/02/2025 Summer Breeze Half Marathon 13.1M, 10K, 5K San Leandro, CA Starting in the San Leandro Marina and running along the shoreline of the San Francisco Bay, you can expect great views and, with any luck, a gentle breeze to keep you cool.
08/02/2025 Susan B Anthony Women's 5K 5K Sacramento, CA Founded in 1976, the Susan B. Anthony (SBA) 5k offers something for both competitive and casual runners alike.
08/02/2025 Truckee Half Marathon 13.1M, 5K Truckee, CA This Truckee Running event showcases the diverse beauty of sierra landscapes and gives runners a taste of our wonderful mountain town.
08/03/2025 Golden Gate Double 8K 8K, 5K, 3K San Francisco, CA It offers unparalleled views of the Golden Gate Bridge for more than 80% of the course!
08/03/2025 Salmon Creek Beach Run 5M, 2M Salmon Creek State Beach, CA Post race picnicking encouraged (but no services or supplies will be provided).
08/03/2025 Skyline 50K 50K, 13.1M Castro Valley, CA Skyline is known as a great race for first-timers.
08/05/2025 Sunset Through the Trees Fun Runs 4M, 2.5M Redding, CA TBD. Race registration only at race day site.
08/06/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/07/2025 Redwoods 100-Mile Challenge 100M Camp Jones Gulch, CA All-Inclusive, 4-night endurance challenge in Santa Cruz Mountains redwoods
08/09/2025 Alameda 10 Miler 10M Alameda, CA We are combining forces with Outfront Endurance and Island Running Festival to bring you a full slate of events.
08/09/2025 Bear Creek 13.1M, 10K, 5K Lafayette, CA If you are looking for a super-fast, flat, easy course to set a personal record, you are probably in the wrong place.
08/09/2025 Byxbee parkrun 5K Palo Alto, CA It is a 5km run - it's you against the clock.
08/09/2025 Marlette Lake Tahoe 50K, 10M Lake Tahoe, CA The Marlette 50K is a truly adventurous romp through some of planet earths most scenic and challenging trails.
08/09/2025 Mt. Madonna Challenge 13.1M, 10K, 5K Gilroy, CA Join us for an exhilarating charity run that fuels dreams and empowers young athletes!
08/09/2025 Wicked Wine Run - Sacramento 5K Elk Grove, CA Join Wicked Wine Run at this beautifully renovated and scenic ranch in Sacramento.
08/10/2025 City Beer Runs - Laughing Monk 5K, 10K San Francisco, CA Join us at our newest brewery partner, Laughing Monk! All of our runs start at a local brew house and work their way through city streets before ending back at the host watering hole for a post run social and raffle! Save $5 with coupon code SWEAT.
08/10/2025 Humboldt Bay Marathon 26.2M, 13.1M, 5K, 1M Eureka, CA The Humboldt Bay Area combines spectacular scenery with the perfect climate for year-round running.
08/10/2025 SAR Wild Run 13.1M, 10K, 5K Shaver Lake, CA Join the hundreds of people supporting Fresno County Search and Rescue with a race in the beautiful Sierra Nevada mountain range.
08/12/2025 Sunset Through the Trees Fun Runs 4M, 2.4M Redding, CA TBD. Race registration only at race day site.
08/13/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/16/2025 Almaden Hills Trail Run 50K, 26.2M, 13.1M, 8M, 10K, 5K San Jose, CA Set in Almaden Quicksilver park. Run in the beautiful hills of Almaden Valley.
08/16/2025 Byxbee parkrun 5K Palo Alto, CA It is a 5km run - it's you against the clock.
08/16/2025 Red Wave 5K 5K , 1.5M Fresno, CA The Red Wave 5k and 1.5mi run is a fundraising event to benefit Red Wave Indoor percussion.
08/16/2025 Redwood (Summer) Trail Run 50K, 26.2M, 30K, 13.1M, 5M Oakland, CA The course travels through beautiful Redwood Regional Park. Enjoy the spectacular views along the East Ridge and West Ridge trails and wind through tall redwoods.
08/16/2025 Tamalpa Headlands 50K 50K Muir Beach, CA Tamalpa Headlands 50k is a demanding ultramarathon with approximately 6,500-feet of elevation gain.
08/19/2025 Sunset Through the Trees Fun Runs 5.5M, 2M Redding, CA TBD. Race registration only at race day site.
08/20/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/23/2025 Angel Island Half Marathon 13.1M, 10K Tiburon, CA You'll fall in love with San Francisco all over again as you follow this hilly loop trail circumnavigating Angel Island.
08/23/2025 Byxbee parkrun 5K Palo Alto, CA TBD. It is a 5km run - it's you against the clock.
08/23/2025 Moonlight Madness 2M Shasta Lake, CA 2-Mile run/walk across Shasta Dam via the moonlight.
08/23/2025 Race for the Arts 5K Sacramento, CA Come out for the Race and stay for the Free Arts Festival, featuring: 5K Run/Walk and Kids Fun Runs.
08/23/2025 Santa Rosa Marathon - 10K/5K 10K, 5K Santa Rosa, CA Join thousands of runners across four race distances and experience the pastoral beauty of late summer in Sonoma County.
08/23/2025 Trail Run at Sly Park 50K, 26.2M, 17M, 13.1M, 8M, 10K, 5K Pollock Pines, CA This event is held at the Sly Park Recreation Area in Pollock Pines, and it’s held under special use permit with the El Dorado National Forest.
08/23/2025 Walt Stack DSE Double Dipsea 13.7M Stinson Beach, CA First held in 1970, the Walt Stack DSE Double Dipsea is a not just another tough trail run. It's a sadistically designed race, intended to test your patience and perseverance.
08/23/2025 We Run Oakland: For Our Children 5K Oakland, CA Join DO & A Sista's Touch for our annual charity, 5K, to raise Human Trafficking Awareness.
08/24/2025 Good Dog - Dirty Dog 5K/10K 10K, 5K Granite Bay, CA This event is for walkers, runners, and their dogs! We are excited to offer this event for athletes and their dogs and hope everyone has a fun time.
08/24/2025 LMJS Fourth Sunday Race 15K, 10K, 5K Oakland, CA Fourth Sunday run.
08/24/2025 Santa Rosa Marathon 26.2M, 13.1M Santa Rosa, CA Treat yourself to scenic miles through dazzling vineyards and pastoral beauty along mostly flat courses in beautiful Sonoma County!
08/26/2025 Sunset Through the Trees Fun Runs 4.3M, 2M Redding, CA TBD. Race registration only at race day site.
08/27/2025 Fog City Run 5K San Francisco, CA A hilly 5km(ish) route through the Marina neighborhood and the Presidio.
08/30/2025 Bubble Run - Sacramento 5K Sacramento, CA Participants run, walk, dance and play across 3 miles rad real estate. Foam Bogs of colored suds are encountered along the course.
08/30/2025 Byxbee Park Run 5K Palo Alto, CA A free, fun and friendly weekly 5K community event. Walk, jog or run. We all participate for our own enjoyment. Please come along and join whatever your pace.
08/31/2025 Crystal Springs Run 50K, 26.2M, 35K, 13.1M, 8K Woodside, CA Experience the towering redwoods, lush ferns and beautiful trails through Hubbart Park, King's Mountain and Bear Gulch.

September 2025

Date Event Distance Location Description
09/01/2025 Davis Labor Day Run 10K, 5K, 1M Davis, CA Make plans to kick off your Labor Day with a run or walk at our annual event. Entry includes a t-shirt, finisher medal and post-race pancakes.
09/03/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/06/2025 BT5K - Northern California 5K Oakland, CA Run, walk or just join in the festivities!
09/06/2025 Byxbee Park Run 5K Palo Alto, CA A free, fun and friendly weekly 5K community event. Walk, jog or run. We all participate for our own enjoyment. Please come along and join whatever your pace.
09/06/2025 China Peak Running Festival 100K, 50K, 25K, 10K Lakeshore, CA Join us in the Western Sierra Range for an ultra mountain trail run. This is a big time race course that will satisfy runners of every level.
09/06/2025 Emerald Bay Trail Run 12K Lake Tahoe, CA Join us for "one of America's most scenic trail runs"
09/06/2025 LSA's Run Home 10K, 5K Los Gatos, CA Life Services Alternatives provide exceptional community living and programs for adults with developmental disabilities.
09/06/2025 Mendocino Running Festival 12H, 6H, 13.1M, 10K Mendocino, CA A full weekend of fun awaits runners of all distances, along with plenty of activities for the entire family.
09/06/2025 Run to Remember 5K, 1M Clovis, CA This event was established in honor and remembrance of the 2,977 people lost in the horrific 9/11 terrorist attack.
09/06/2025 Stevens Creek Striders Reservoir Run 13.1M, 11K, 2.5M Cupertino, CA This run is a wonderful introduction to trail running, yet it promises to be challenging enough for the most experienced trail and ultra trail runners.
09/06/2025 Tanri Lake Race 10H Miramonte, CA Enter either as an individual or a relay team of three runners. The 10 hour individual race lets runners complete as many 5 mile laps around Lake Sequoia as possible.
09/07/2025 Annadel Loop 6.8M Annadel State Park, CA The Annadel Loop is a 6.75 mile run sponsored by the Empire Running Club. This is a challenging loop in the hills of Annadel State Park.
09/07/2025 Berkeley Mapathon and Half 26.2M, 13.1M Berkeley, CA Enjoy amazing highlights and lesser known secrets of Berkeley in an epic way - a Mapathon!
09/07/2025 Cancer Champions Run/Wallk 10K, 5K, 1M West Sacramento, CA Choose your distance and please join us!
09/07/2025 Diablo Trail Race 50K, 26.2M, 13.1M, 10M, 4M Clayton, CA Mount Diablo provides spectacular views of San Francisco Bay Area and surrounding valleys. The longer events are mountainous and very scenic.
09/07/2025 Diplos Run Club 10K 10K San Francisco, CA Sign up now, grab your gear and join hundreds of enthusiasts in a celebration of health, happiness and the sheer joy of being active.
09/07/2025 Fiesta 10K 10K, 1M Fresno, CA Come and celebrate Mexican Independence Day at this unique event! Challenge yourself and do a DOUBLE RUN!! Yes, do the MILE followed by the 10K.
09/07/2025 Mammoth Bar Trail Runs 13.1M, 10K, 5K Auburn, CA Mammoth Bar is known for its steep climbs and descents as well as its beautiful American River Canyon views. These are not your average courses.
09/10/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/12/2025 Mammoth BUFF - Beer Mile Run 1M Mammoth Lakes, CA In honor of what was once Oktoberfest's Beer Run, we now host our own beer run to keep the party going.
09/13/2025 Berkeley Trail Adventure 50K, 35K, 13.1M, 10K Berkeley, CA Our Berkeley Adventure Run brings runners and walkers into two East Bay gems. Fabulous for all runners and even for those embarking on their first trail running event.
09/13/2025 Byxbee Park Run 5K Palo Alto, CA A free, fun and friendly weekly 5K community event. Walk, jog or run. We all participate for our own enjoyment.
09/13/2025 Donate Life Run/Walk 10K, 5K San Ramon, CA Together, we can save and heal more lives! One by one, together, we have the power to give hope to the men, women and children waiting for a second chance at life.
09/13/2025 Hedgehog Dash 13.1M, 10K, 5K Sacramento, CA Get ready for a unique experience at the Hedge Hog Dash in the vibrant city of Sacramento!
09/13/2025 Hedgehog Dash 13.1M, 10K, 5K San Francisco, CA Get ready for a unique experience at the Hedge Hog Dash in the vibrant city of San Francisco!
09/13/2025 National Chocolate Day: Run for Chocolate - San Francisco 26.2M, 10K, 5K, 1M San Francisco, CA Get ready to indulge in a sweet celebration! This event is tailor-made for chocolate lovers of all ages and fitness levels.
09/13/2025 National Chocolate Day: Run for Chocolate -Sacramento 26.2M, 10K, 5K, 1M Sacramento, CA Get ready to indulge in a sweet celebration! This event is tailor-made for chocolate lovers of all ages and fitness levels.
09/13/2025 Pincushion Hill Climb 1M Friant, Ca 1 Mile! Straight Up! This will be a chip timed hill climb starting at the San Joaquin River Trailhead and finishing at the top of Pincushion Mountain.
09/13/2025 Running Fence Run - A Celebration of Freedom and Democracy 10K Cotati, CA This is more than just a race, it's a celebration of : the enduring spirit of democracy, artistic expression, physical achievement and unity and rememberance.
09/13/2025 South Hills Single Track Trail Run - Fall 50K, 26.2M, 16M, 13.1M, 9M, 10K, 5K, 1M San Jose, CA Our mission is to provide the most scenic, challenging and fun runs in California. Come run the Miner's Ghost Town and we promise you won't be disappointed!
09/13/2025 Stevens Creek Striders Saturday Run 5M to 13M Cupertino, CA We meet every Saturday at 8:30 am at the Reservoir Parking Lot for a run, often followed by brunch.
09/13/2025 XTERRA Lake Tahoe 5K/10K 10K, 5K Tahoe, CA Hit the dirt in this classic trail run, loop a beautiful trail system featuring tall pines, aspen groves and creek crossings.
09/13/2025 ZERO Prostate Cancer Run/Walk - Napa 5K, 1M Napa, CA We are #ZERO Strong Together! Register and start fundraising today to support prostate cancer patients and families!
09/14/2025 Buffalo Stampede 10M, 4M Sacramento, CA The Buffalo Stampede 10-Mile Run/Walk, the race that kicked off Sacramento’s road-racing tradition, is over forty years old!
09/14/2025 Honey Badger Half Marathon 13.1M, 10K, 5K Santa Venetia, CA The Badger's race takes place in China Lake State Park in Santa Venetia. Sign up now to receive your AWESOME race "woodallion" AND Lifestyle tee.
09/14/2025 One Mile 4 One Child Charity Run 10K, 5K, 1M San Jose, CA Experience the thrill of San Jose Valley Charity Running event.
09/14/2025 Race to Slow the Pace 5K Lodi, CA The run will foster a connection to the land and the importance of slowing the pace of development to protect valuable farmland.
09/17/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5km(ish) route through the Marina neighborhood and the Presidio.
09/18/2025 Mammoth Trail Fest 50K, 26K Mammoth Lakes, CA Donuts, dirt, and epic trail running across the top of California.
09/20/2025 Byxbee Park Run 5K Palo Alto, CA A free, fun and friendly weekly 5K community event. Walk, jog or run. We all participate for our own enjoyment.
09/20/2025 Gold Rush Growler Trail Run 10M, 5K Granite Bay, CA This run starts at Granite Beach on Folsom Lake. The Gold Rush Growler features scenic single track courses along the shoreline.
09/20/2025 Kiwanis River Run 5K, 2M Fresno, CA This is a chance to make a difference as proceeds support the Valley Children's Hospital Pediatric Trauma-Injury Prevention Program.
09/20/2025 Lederhosen 5K 5K Olympic Village, CA Come out to Squaw Valley and start your Oktofest off with the Lederhosen. A super fun 5K in North Lake Tahoe to celebrate Oktofest.
09/20/2025 Mt. Umunhum Marathon 50K, 26.2M, 25K San Jose, CA Introducing the ultimate trail running experience, an adventure that transcends boundaries. Embark on a breathtaking journey through rough, untamed beauty!
09/20/2025 Newark Mile 4K Newark, CA The Newark Mile 4K is held each year in conjunction with Newark Days to celebrate the incorporation of the city.
09/20/2025 Rebel XC Challenge 6K Sacramento, CA The Rebel XC Challenge, sponsored by the River City Rebels, a Sacrmento-based club, will take place at Hoffman Park in Carmichael.
09/20/2025 Rocky Ridge Trail Half Marathon 13.1M, 10K, 5K San Ramon, CA This is the race your momma warned you about! The half marathon cannot be described as "flat and fast" or "good for beginners" or with any other nice phrase.
09/20/2025 Stevens Creek Striders Saturday Run 5M to 13M Cupertino, CA We meet every Saturday at 8:30 am at the Reservoir Parking Lot for a run, often followed by brunch.
09/20/2025 Stride for Hope 10K, 5K Fresno, CA Together, we can save and heal more lives! One by one, together, we have the power to give hope to the men, women and children waiting for a second chance at life.
09/21/2025 Asha-Jyothi 5K 5K Fremont, CA Our organization is dedicated to serve the educational and healthcare needs of underprivileged children. This event is more than a run, it's all -singing and all-dancing at the end.
09/21/2025 Eureka Schools Foundation Fund Run 5K Granite Bay, CA Ready to run, have fun, and make a difference? It’s time to lace up your sneakers and hit the pavement for an amazing cause!
09/21/2025 Island Running Festival 13.1M, 10K, 5K, 1M Alameda, CA We bring a distance for every runner in a single day of racing. All races start and finish at Faction Brewery.
09/24/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
09/26/2025 THE MAMMOTH 208M Mammoth Lakes, CA This epic foot race takes you through the Eastern Sierra. Your route will take you along pristine alpine lakes, abandoned mines, golden fall foliage and dense pine forests.
09/27/2025 A Walk/Run to Remember 5K Carson City, NV Join the fight to end Alzheimer's. All participants and teams are invited to show your PURPLE!
09/27/2025 Belmont Water Dog Run 10K, 5K, 1M Belmont, CA This run has grown into an anticipated annual community event. Every year students from our local high school volunteer to help organize this event.
09/27/2025 Big Sur Trail Marathon 26.2M, 13.1M, 5M Big Sur, CA Along the route you'll see some of the most amazing views that the California coastline has to offer.
09/27/2025 Byxbee Parkrun 5K Palo Alto, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
09/27/2025 Cloverdale Hoptoberfest 4M Cloverdale, CA Get ready for an unforgetable day where fitness,, community and craft beer collide!
09/27/2025 Dick Collins Firetrails 100K, 50M, 26.2M Castro Valley, CA These races are run on the famous trails of the East Bay in the San Francisco Bay Area. Join us for some beautiful courses.
09/27/2025 Great Trail Race 21K, 18K Tahoe City, CA The Great Trail Race is an epic point to point route between Truckee and Tahoe City, CA that you can either Ride or Run.
09/27/2025 HERS Breast Cancer Foundation Run/Walk 10K, 5K Fremont, CA Join us at Quarry Lakes Reginal Park as we run/walk to support Bay Area breast cancer survivors.
09/27/2025 National Coffee Day: Run for Coffee - Sacramento 26.2M, 10K, 5K, 1M Sacramento, CA Get ready for a caffeine-filled adventure! This exciting event invites coffee lovers of all ages and paces to participate.
09/27/2025 National Singles Day: Singles and Friends Running Club - Sacramento 26.2M, 10K, 5K, 1M Sacramento, CA Get ready to lace up your sneakers and join the excitement. This unique running experience is designed for individuals looking to meet new friends.
09/27/2025 Pacifica Summit Run 13.1M, 10K Pacifica, CA Do you want to know what the view looks like from the tallest mountain on the upper San Francisco Peninsula? Then look more further than the Pacifica Trail Run!
09/27/2025 Ridge Rambler Half Marathon 13.1M Bridgeport, CA This is a POINT TO POINT COURSE!! The start line is not near the finish line but we will offer a shuttle from the finish back to the start.
09/27/2025 Spartan Trail - San Jose Trail Challenge 50K, 13.1M, 10K Saratoga, CA Spartan has done a big jump into the trail running scene through Spartan Trail, creating and partnering with world class events for an outstanding experience.
09/27/2025 Stevens Creek Striders Saturday Run 5M to 13M Cupertino, CA We meet every Saturday at 8:30 am at the Reservoir Parking Lot for a run, often followed by brunch.
09/27/2025 Sunset & Cider Trail Races 50K, 13.1M, 5M Auburn, CA Join us for an unparalleled adventure at the Sunset & Cider Trail Races, where your favorite race awaits in the heart of American Canyon in Auburn.
09/27/2025 Superhero Run 5K Lodi, CA Save the date! Every kid needs a hero but kids in foster care need SUPERHEROES! Run your own race at your own pace.
09/27/2025 Urban Cow Half Marathon 5K Sacramento, CA Join the herd at the Urban Cow weekend, Sacramento's top running event. Start your weekend with a scenic 5K run/walk through beautiful William Land Park.
09/28/2025 Hot Pink Fun Run 10K, 5K, 1M Roseville, CA Join us in the "Fight Against Breast Cancer"! Gather your friends and family and enjoy a fun race, followed by pancakes, bubbles and brews…
09/28/2025 LMJS Fourth Sunday Race 15K, 10K, 5K Oakland, CA The distances offered at this race are one, two and three times around Lake Merritt.
09/28/2025 Phil Widener Empire Open 3.4M Santa Rosa, CA The course is 3.4 miles of rugged dirt trails, a bit of asphalt bike path, a few short hills and some wicked competition. Please plan to arrive early or carpool.
09/28/2025 Urban Cow Half Marathon 13.1M Sacramento, CA Follow Saturday's run with the Half marathon on Sunday. The half showcases Sacramento's most iconic neighborhoods and landmarks, including Capital Mall, Old Sacramento, and more!
09/28/2025 ZERO Prostate Cancer Run/Walk - Sacramento 5K, 1M Sacramento, CA Let's #ZERO out Prostate Cancer Together! Register and start fundraising today to support prostate cancer patients and families!

October 2025

Date Event Distance Location Description
10/01/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/04/2025 Auburn Half Marathon 13.1M, 12K, 5K Auburn, CA A half marathon, 12K and 5K will take runners from the Auburn Overlook park, into Auburn State Recreation Area.
10/04/2025 Byxbee Parkrun 5K Palo Alto, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/04/2025 Frida Fun Run 5K, 2K Fresno, CA This race is also part of The Central Valley Runner of the Year Series.
10/04/2025 HDSA Team Hope 5K Fun Run 5K San Francisco, CA Join us for the San Francisco Team Hope 5K Walk & Fun Run along Crissy Field.
10/04/2025 Nor Cal Think Pink 5K 5K Redding, CA Help us RUN into October with one of our most popular events!
10/04/2025 Reservoir Dogs Trail Run 35K, 13.1M, 10K, 5K Orinda, CA The Start and Finish for all races will be in the San Pablo Reservoir Recreation Area.
10/04/2025 Rock 'n' Roll San Jose Half 5K San Jose, CA Welcome to Speed City, USA! Nicknamed after the legendary San Jose State track teams of the 60s, San Jose is all about speed.
10/04/2025 Star City San Bruno Mountain Half Marathon 13.1M Brisbane, CA Our race was dreamed up by runners who love the trails of San Bruno Mountain.
10/04/2025 Think Pink 5K 5K Yuba City, CA We still want to honor our survivors and celebrate those who have battled breast cancer along with other female forms of cancer.
10/04/2025 Wild Wild West Marathon 50M, 50K, 26.2M, 10M Lone Pine, CA Run in the shadow of the High Sierra and through the Alabama Hills.
10/05/2025 Judgment Day Half Marathon 13.1M Bakersfield, CA This is a very scenic course.
10/05/2025 Lions Turtle Bay Run 13.1M, 10K, 2M Redding, CA We have runners from various parts of the country come to compete in the sport of running.
10/05/2025 Peace Officer Memorial Run 13.1M, 5K, 1M Modesto, CA This race was developed to honor the police officers from Stanislaus County who were killed in the line of duty.
10/05/2025 Pumpkin Run 5K Clovis, CA Run or walk along our scarecrow and pumpkin decorated course and earn your pumpkin and start a new family tradition!
10/05/2025 Run by the Sea 13.1M, 12K, 4K Santa Cruz, CA This unique Half Marathon meanders along the gorgeous coastal bluffs of California's Central Coast in Santa Cruz and consists mostly of flat, packed dirt trails.
10/08/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/10/2025 Mile Madness Endurance Run 72H, 48H, 24H, 100M, 12H, 6H Rocklin, CA The course is 1.05 miles in length, meaning you will need to run 96 laps to get your 100-Mile buckle.
10/11/2025 Bizz Johnson 50K, 26.2M, 13.1M, 10K Susanville, CA The Bizz Johnson Trail Marathon and 50K distances begin at Mason Station with an out and back on McCoy Road.
10/11/2025 Byxbee Parkrun 5K Palo Alto, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/11/2025 Granite Head Trails & Ales 11.2M, 6.6M Granite Bay, CA Granite Head is definitely the cure for what ales you!
10/11/2025 Look Good Feel Good Race 26.2M, 13.1M, 10K, 5K San Leandro, CA Fasten your running/walking shoes and experience an adventurous run along the San Francisco east bay shoreline.
10/11/2025 Mt. Umunhum Trail Conquest 50K, 26.2M, 13.1M, 5K San Jose, CA This race starts at the Hacienda Entrance of Almaden Quicksilver Park.
10/11/2025 Ruth Anderson Memorial Endurance Run 100K, 50M, 50K San Francisco, CA Race HQ (bib#s, Start) : Lake Merced Blvd. & Sunset Blvd., San Francisco, CA.
10/11/2025 Wicked Wine Run 5K American Canyon, CA Join the Wicked Wine Run for a fun-filled day of running or walking through the scenic vines, followed by wine, music, and friends!
10/12/2025 Cindy's Race 10K/6K 10K, 6K, 1K Santa Rosa, CA 1 in 8 women will be diagnosed with breast cancer in their lifetime. Cindy is a mother, a wife, a friend who received this diagnosis. So, we race.
10/12/2025 City Beer Runs - Standard Deviant Brewing 10K , 5K San Francisco, CA City Beer Runs combines fully supported 5K and 10K runs with some of the best beer around to create one big run loving social event! Each run starts at a local brew house and works its way through city streets before ending back at the host watering hole for a post run social! Save $5 with coupon code SWEAT.
10/12/2025 Clo Cow Half Marathon 13.1M, 10K, 5K Petaluma, CA The running of the Clo Cow Half Marathon, 10K & 5K is set to return to Historic Downtown Petaluma.
10/12/2025 Humboldt Redwoods Marathon 26.2M, 13.1M, 5K Weott, CA This race is in Humboldt Redwoods State Park and the Half Marathon follows the second half of the iconic Avenue of the Giants Marathon course.
10/12/2025 Lake Evans 5K/10K 10K, 5K Bakersfield, CA 5K & 10K Run/Walk.
10/12/2025 Run for Education 10K, 5K San Ramon, CA Come for the Run, Stay for the Fun.
10/12/2025 Run for Vision 5K 5K San Francisco, CA TBD. Join us at the Run for Vision 5K in October for a great race.
10/15/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/17/2025 Lake Tahoe Marathon Weekend 72M, 52.4M, 26.2M, 13.1M South Lake Tahoe, CA October 17-19, 2025.
10/17/2025 Lake Tahoe Marathon: Nevada Half 13.1M South Lake Tahoe, CA The Nevada Half Marathon is a boutique down hill half marathon starting at the top of Spooner Summit, ending on the bike path on Lakeshore Drive.
10/18/2025 Break Free Run 10K, 5K Folsom, CA Stand up against human trafficking this October by registering for the Break Free Run!
10/18/2025 Byxbee Parkrun 5K Palo Alto, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/18/2025 Cal-Neva Marathon 26.2M Lake Tahoe, CA The Cal-Neva Marathon is a boutique marathon limited 100 to a la carte runners. It is run as part of the Tahoe Triple.
10/18/2025 California Gold Rush Trail Run 13.1M, 15K, 10K, 5K Coloma, CA All of the courses are a mix of very appealing singletrack dirt trails and a few paved areas.
10/18/2025 Diablo Summit Stomp 30K, 13.1M, 10K, 5K Coloma, CA Courses are all on dirt trails, heading out from Castle Rock park in Walnut Creek, heading into Mount Diablo State Park -- all the way to the summit for the 30K.
10/18/2025 Donut Fun Run 5K Alameda, CA The Donut Fun Run will be a timed, donut-themed 5k race held at Alameda Point's Seaplane Lagoon Promenade.
10/18/2025 Head for the Cure 5K - San Francisco 5K San Francisco, CA Join us for our annual Head for the Cure 5K - San Francisco as we raise funds, awareness, and hope for the San Francisco brain tumor community!
10/18/2025 John Wayne Grit Series - Lone Pine 13.1M, 10K Lone Pine, CA The run benefits John Wayne Cancer Foundation.
10/18/2025 Lake Tahoe Marathon: Carnelian Bay Half 13.1M Lake Tahoe, CA This boutique half marathon course starts from Carnelian Bay and ends at Meadow Drive & H89.
10/18/2025 Oktoberfest Fun Run 10K, 5K Campbell, CA Kick off your Oktoberfest celebrations at Campbell’s Annual Oktoberfest Fun Run 10K, 5K & Kids' Dash.
10/18/2025 Willow Hills XC 5K Folsom, CA This 5k race is run in two loops of rolling hills around a water reservoir right next to Folsom High School.
10/19/2025 Big Steps for Little Friends 5K 5K San Francisco, CA NLF’s Big Steps for Little Friends 5K Run/Walk will be at Golden Gate Park.
10/19/2025 Cloverdale Vineyard Races 26.2M, 13.1M, 10K, 5K Cloverdale, CA Join us for our annual event, with all races in the vineyards near the historic Asti Winery!
10/19/2025 Dia de los Muertos Half 13.1M, 5K Bakersfield, CA Join Us for a Vibrant Celebration of Life and Remembrance!
10/19/2025 Fresno Donut Run 5K Fresno, CA A fun Donut Themed 5k Run & Walk at Woodward Park!
10/19/2025 Great Pumpkin Run 13.1M, 10K, 5K Half Moon Bay, CA The world-famous Half Moon Bay Art & Pumpkin Festival is the season’s signature event, drawing hordes of visitors to the “World Pumpkin Capital” for an epic festival.
10/19/2025 Lafayette Reservoir Run 10K, 5K, 2M Lafayette, CA The Run is the city’s most popular “family affair”.
10/19/2025 Lake Tahoe Marathon 26.2M South Lake Tahoe, CA TBD. Sunday's Marathon is the original Lake Tahoe Marathon , and is the 3rd marathon of the Triple Marathon.
10/19/2025 San Mateo Rotary Fun Run 10K, 5K San Mateo, CA San Mateo Rotary Fun Run
10/19/2025 Women's Run San Francisco - Mermaid Series 10M, 10K, 5K San Francisco, CA 5k, 10k, Sirena10 Mile, Mermaid Dash, Virtual Run.
10/22/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5K (ish) route through the Marina neighborhood and the Presidio.
10/25/2025 Big Sur River Run 10K, 5K Big Sur, CA TBD. A beautiful loop course along the Big Sur River and the towering redwood trees of Pfeiffer Big Sur State Park.
10/25/2025 Byxbee Parkrun 5K Palo Alto, CA A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
10/25/2025 CASA of Kern County Superhero Run 10K, 5K, 2K Bakersfield, CA Join fellow heroes and villains as we run, walk, and fly in support of children in foster care.
10/25/2025 Miles for Migraine - San Francisco 5K San Francisco, CA This event is a fundraiser for Migraine & Headache Awareness, Treatment & Research.
10/25/2025 Monster Mash Dash 5K Fresno, CA This Halloween-themed annual race is a not to miss event and we guarantee you will experience a spooktacular fun time! Wear a Costume and be in our Costume Contest!
10/25/2025 Napa Wine Country Marathon 26.2M, 13.1M, 10K Calistoga, CA Babbling streams will be your soundtrack as you challenge yourself on the lush singletrack within Bothe-Napa Valley State Park.
10/25/2025 Oakland Hills Trail Run 35K, 13.1M, 10K Oakland, CA A hidden redwood forest lies in the hills just a few miles over the ridge from downtown Oakland.
10/25/2025 Pinkathon Challenge for Breast Cancer 50K, 26.2M, 13.1M, 10M, 10K, 5K San Francisco, CA The Pinkathon will happen as both an In-Person Event on Saturday, October 19, 2024 and as a Virtual Challenge that you can do wherever you want during the month of October!
10/25/2025 Trail Run at Sly Park 50K, 26.2M, 18M, 13.1M, 8.5M, 10K, 5K Pollock Pines, CA This event is held at the Sly Park Recreation Area in Pollock Pines, and it’s held under special use permit with the El Dorado National Forest.
10/26/2025 Bakersfield Monster Mash Dash 5K Bakersfield, CA This Halloween-themed annual race is an event that you won't want to miss and we guarantee you will experience a spooktacular fun time!
10/26/2025 Day of The Dead 5K 5K Fair Oaks, CA Our race begins in the center of Old Fair Oaks Village before descending over the bridge along the scenic American River Trail.
10/26/2025 Dia de los Miles 5K Elk Grove, CA Celebrate Hispanic heritage by joining us for the annual Dia de los Miles 5K and kids’ fun runs.
10/26/2025 Dia De Los Muertos 5K 5K Clovis, CA Join us at this special celebration for "Dia de los Muertos"! Participants are encouraged to dress in their Dia de los Muertos make up and costumes!
10/26/2025 LMJS Fourth Sunday Race - October 15K, 10K, 5K Oakland, CA The distances offered at these races are a 5K (once around the Lake), a 10K (two times around), and 15K (three times around).
10/26/2025 Winters Spooktacular Fun Run 10K, 5K, 1M Winters, CA Grab your costume and running shoes and head out to the Winters Runners and Walkers Club Spooktacular Fun Run and Costume Contest.
10/29/2025 Fog City Run 5K San Francisco, CA The course is a hilly 5km (ish) through the Marina neighborhood and the Presidio.