Race Calendar

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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		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.

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		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.

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		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.

Did we miss any races? Please email us the race details (including web site URL) and you'll be entered in a monthly contest to win cool prizes. Race details should be sent to calendar@sweattracker.com