Trail Running Calendar California 2026-2027

A Stadion 5 km obstacle race with 20 obstacles at Angel Stadium of Anaheim, plus a kids race and spectator tickets. The event has a 4.8 rating from 40 testimonials and offers team entry options and a service member discount.

Trail races on September 12, 2026 in Tilden and Wildcat Canyon near Berkeley, offering 10K, half, 35K and 50K with marked technical trails, aid stations every 5–7 miles, chip timing, and a cupless format.

A family-oriented mud run in Redding on September 12, 2026 featuring a course just under 5 km with obstacles, creek crossings, vendors, food, and children's activities. The event supports the Active 20-30 Club of Redding.

A USATF sanctioned trail event at Stevens Creek Reservoir offering a half marathon, 11K, and a family Lollipop Loop around shaded singletrack and ridge views, with aid stations, limited field sizes, post-race barbecue, and charity support.

An evening trail event in Griffith Park featuring a 10 Mile Relay for teams, a 5K solo race, and a 1K kid run, plus live music, race photos, finisher medals and on-course medical support.

A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.

Trail running at Bass Lake, CA on September 12, 2026, with 50 mile, 50K and half-marathon options through Sierra National Forest terrain, aided by stocked stations and a shuttle to the start.

A Last One Standing event at Smith Ranch in Bradley, CA where runners repeat a 4.18 mile dirt loop each hour and must finish within the hour to continue. The final runner to complete the loop wins a custom western style trophy buckle.

Multi-distance trail races on 100% dirt single-track loops at Smith Ranch near Bradley, California. Onsite primitive camping, nightly bonfires and live music accompany aid stations roughly every 3 miles.

Mile Madness is a looped trail event in Auburn, California held September 18-21, 2026, with timed races from six hour up to 72 hour and a 100 mile option. The 0.85 mile loop includes stocked aid stations, relays, massage, and buckle awards.

Trail runs at Granite Beach on Folsom Lake with new 10 mile and 5K courses, aid stations, age group awards, a finisher beer glass and a postrace meal.

Kiwanis River Run in Fresno presents multiple trail and fun-run distances along the San Joaquin River while supporting the Pediatric Trauma Injury Prevention Program at Valley Children's Hospital. The event includes participant shirts, meda..

An evening trail event in Topanga's Red Rock Canyon featuring a 10k with significant vertical and a non timed 4.5 mile Hiker's Delight. The event includes aid stations, a beer garden for 21 plus, vegan tacos, sports massage and awards.

Rocky Ridge is a trail running event at Las Trampas Wilderness in San Ramon, California on September 19, 2026. It features a half marathon plus 10K and 5K courses with uphill trail sections and scenic vistas.

A community road and trail event on September 19, 2026 in Fresno with 10K, 5K, 2 mile and a kids 1/4 mile run. Scenic riverside routes, participant shirt and medal, and proceeds support Valley Children's Hospital injury prevention.

A community road and trail running event in downtown Healdsburg on September 19, 2026, featuring 10K and 3K courses and raising funds for the Healdsburg Kawanis. Group registration and packet pickup at Healdsburg Running Company are availab..

A multi-day trail running festival in Mammoth Lakes with races from a kids 1K to a 50K and a Dragon's Back ascent, plus festival programming, prize purses, timing, aid stations, and lodging discounts.

An urban event in downtown Los Angeles with a stair climb up 1,664 steps at the U.S. Bank Tower, an Urban Hike past major cultural sites, a Heroes Challenge category, and a virtual participation option.

A weekend of Spartan obstacle races at Lake Elsinore Raceway on Sep 26 and 27, 2026 featuring Sprint and Super courses, kids races, Hurricane Heat challenges, and spectator access near a large natural freshwater lake.

A 3.1 mile trail event at Ascot Hills Park in Los Angeles with chip timing and views of Dodger Stadium and the Hollywood sign. Proceeds support the Wilson High School Fire and Police Magnet Cadet Program and Ascot Hills Park.