Trail Running Calendar California 2025-2026

Enjoy scenic trails along Millerton Lake and the San Joaquin River at the San Joaquin River Trail race in Friant CA. Choose from 50k, 25k or 10k, earn a finisher medal and swag, and race for overall and age group honors.

Event details Ray Miller 50/50 is scheduled for Saturday, December 6, 2025, at Point Mugu State Park in Malibu, CA. The event listing states the 2025 edition is sold out. A waitlist is maintained and the listing indicates waitlisted entrant..

Run the scenic Quarry Lakes and Alameda Creek Trail in Fremont with options from a free kids dash up to the full marathon. Flat, well marked courses, finisher medals and preregistered shirts make this a fun, family friendly race day.

2025 Death Valley Trail Marathon, Half Marathon, & 10K The event is the 37th annual Death Valley Trail races, held on December 6, 2025 in Death Valley National Park, Inyo County, California. Distances offered: Marathon Half Marathon 10..

The Fremont Canyon 28k Trail Run is an exciting running event taking place in Irvine Regional Park, Orange, California. Scheduled for December 6, 2025, this challenging 28k (17.5 miles) course features fire roads with an elevation gain and..

Event details The Calero Trail Run - Winter is set for Saturday, December 6, 2025, at Calero County Park in San Jose, California. The event offers multiple trail distances: 50K Trail Marathon 25K Half Marathon 15K 10K 5K Mile Kids Run Rac..

Event overview The Anza Borrego Cuyamaca 50 Mile Run is a point-to-point trail race in Julian, CA on December 6, 2025. The course covers 50 miles and has a 14.5-hour finish cutoff. The route starts at the Sunrise Trailhead and descends into..

Experience scenic single track trails and rolling climbs at China Camp and Harry Barbier Memorial Park in San Rafael on December 6, 2025. Choose a 30K, half marathon, or 10K in a friendly cupless event with on course aid.

Event overview The Over The Hill Track Club stages the High Desert Ultra in Ridgecrest, California on December 6, 2025. The event includes the following race distances: 50K 30K 10K All distances start and finish at the Cerro Coso Communit..

The Tenth Annual Keepin' It Rural 5K/10K Trail Race and Festival takes place at the scenic Elfin Forest Recreational Reserve in north San Diego. This unique event features chip-timed races for both 5K and 10K runners, with a special course..

Event overview The Hunter S. Thompson Fear & Loathing is an annual urban ultrarun in San Francisco, held as the 41st running on December 7, 2025. The event is presented by Haight Ashbury Ultra Society, Zombie Runners, and Fat Ass Runner..

Run scenic single track trails through redwood and pine groves at Summit Rock in Sanborn Regional Park near Saratoga, CA. Choose 5K, 10K or half marathon, enjoy park peak views, walk if needed, and take home a custom finisher medal.

Take on scenic Daley Ranch at the Dixon Lake Trail Race in Escondido on December 13, 2025. Choose 10 mile, 10K or 5K routes, enjoy sweeping views from Standley Peak and earn ERS Championship qualifying points.

Run for a Claus presented by Optima Tax Relief is an annual charity run in Irvine, California, hosted on the University of California, Irvine Ring Road campus. The event features a 5K and a Kids 1 Mile Run/Walk, with virtual 5K and virtual..

Take in ocean views at Crystal Cove State Park on December 13, 2025 with 15K, 6K and kids 1K options for every pace. Finishers get medals and shirts, free photos and a festive post race beer garden and breakfast.

Folsom Lake Point to Point Trail Half Marathon : December 13, 2025 The event is a Half Marathon held in El Dorado Hills, CA on December 13, 2025. The course is point-to-point and is primarily run on the Southside Trail alongside Folsom Lake..

The Lunatic Loop 12 Hour Run will take place in Ramona on Saturday 13 December 2025. You can run between 6 and 12 kilometers.

Event details The Hark the Herald race returns for its 37th annual running on Saturday, December 13, 2025, at Angel Island State Park near Belvedere Tiburon, CA. The event is limited to 400 participants. Distances offered: Half Marathon -..

Mulholland Under the Stars Trail Race The event takes place on Saturday, December 13, 2025, at Marvin Braude Mulholland Gateway Park in Tarzana, CA, with the start and finish at the trailhead lot. It is a night trail race run on fire roads..

Doomsday Trail Run in Cool, CA on December 13, 2025 offers a rugged 50K and an energetic Half Marathon on scenic, hiker friendly trails. Entries are limited to 200 and all finishers receive a race shirt and a weighted finisher medallion.