Trail Running Calendar California 2026-2027

A weekend obstacle course event at Stanislaus County Parks offering multiple races from a kids run to a 50 km ultra, with technical trail sections and signature obstacles across grasslands and hills.

Multi distance trail running and gravel bike events at Diamond Valley Lake in Hemet, California. Routes include lakeside loops, out and back courses, a stroller 5K and a kids fun run.

Trail races at Mount Diablo on April 3, 2027 range from a 50K to a 5K, with tiered registration fees, a remote runner option, and a BBQ ticket. A portion of entry fees supports Save Mount Diablo's open space preservation.

San Diego Spartan Event Weekend at Pala Fox Raceway on April 10 and 11, 2027 features a 5 km Sprint, a 10 km Super, kids races, spectator access, and a post-race festival with mud pits and rope climbs.

A 50K out-and-back on Pacific Crest Trail and desert tracks, featuring a steep 2,000 foot descent into Box Canyon and a long climb back up Oriflamme Canyon, with stocked aid stations and a 150-runner field.

A lap race on a 2.5 mile farm loop in Reedley, California, held the weekend of April 17-18, 2027, with fixed distances, timed categories, a 100 mile option, and team relays. The course features on-course camping and fully stocked aid statio..

A women's only 10K in Auburn on April 17, 2027 that follows scenic trail loops with aid stations and age-group awards; the overall winner and four additional finishers will be selected to receive all-expenses-paid trips to a women's running..

A trail event at Skyline Ridge Open Space Preserve offering distances from a 50 yard kids dash to a 50K race. Routes run largely on the Bay Area Ridge Trail with ocean and Santa Cruz Mountains views.

A trail event at Lake Chabot Regional Park offering distances from a 50‑yard kids dash to a 50K ultramarathon. The looped course circles the Lake Chabot reservoir and surrounding hills with measured distances.

A 100-mile loop around Lake Cuyamaca and nearby parks on mostly single-track trails, the San Diego 100 features about 15,600 feet of climbing, a 32 hour cutoff, crewed and Solo divisions, and strict qualification and volunteer requirements.

A self-supported marathon at Canyonside Park Driveway in San Diego on May 3, 2026, presented as a non-race with no course markings or aid stations. Participants may crew or pace and can run any portion; a GPX file and restroom access near m..

Coyote Two Moon is a multi-distance trail running event near Ojai, California offering courses from 10K to 100 miles with significant elevation gain and limited entries. The longer distances require qualifying trail results and the race has..