Trail Running Calendar California 2026-2027

A 28k trail run in Fremont Canyon at Irvine Regional Park featuring about 3800 feet of elevation change and four aid stations. The course runs on fire roads, is cupless, and participants are asked to carry personal hydration.

A multi-distance trail event at Calero County Park in San Jose featuring single-track, hills and varied terrain. Aid stations, drop-bag service for the 50K, free parking and support access at Rancho Cañada del Oro are provided.

Ray Miller 50/50 in Point Mugu State Park, Malibu, CA on December 5, 2026 offers 50 mile, 50K and 30K options. Registration opens April 1 and closes September 1.

A Ridgecrest trail event featuring 50K, 30K and 10K loop courses on rolling desert roads, multiple aid stations, and handmade finisher medals.

Peacock Gap Trail Run at China Camp State Park on December 5, 2026 offers 10K, half and 30K trail courses with marked single track and fire roads, chip timing, aid stations, and a cupless water policy.

A night trail race in Tarzana on December 5, 2026, with lighted routes through the Santa Monica Mountains. Offered as 5K and 10K, the event has notable elevation, aid stations, required headlamps, and post race medals and shirts.

The Hunter S. Thompson Fear & Loathing will take place in San Francisco on Sunday 6 December 2026. You can run between 50 and 50 miles.

A holiday themed run in Valencia offering 5k, 10k, 15k and a half marathon on looped trails with aid stations each loop. Entries include finisher medals, goodie bags, photos and posted results.

A Last Person Standing race in Yucaipa, CA where runners must complete a repeated *4.167 mile* loop each hour until one remains. Basecamp offers warmth between laps and limited camping is available at Five Winds Camping.

Trail races at Crystal Cove State Park near Newport Beach include a 15K, 6K and Kids 1k on varied single track and fire roads, with shirts, finisher medals, free photography, breakfast options and a post race beer garden.

Trail races through redwood groves at Sanborn Regional Park with a half marathon, 10K and 5K. Routes use single track trails and chip timing, and walkers and hikers are welcome.

Trail races at Daley Ranch near Dixon Lake offer 10 Mile, 10K and 5K courses from El Caballo Park with single track and dirt roads. The 10 Mile climbs Standley Peak for a 360 degree view and the field is limited to 300 runners.

A point to point half marathon on the Southside Trail at Folsom Lake featuring mostly single track, an overall ascent of 1,683 ft, multiple aid stations and a 4.5 hour time limit, starting at Salmon Falls and finishing at Brown’s Ravine.

A multi-distance trail race at Magnolia Ranch Trailhead in Pilot Hill, CA on December 12, 2026, organized by Troy's California Trail Runs, featuring stony dirt paths, hill sections, and lake views with options from a kids run to a 50K.

A multi-distance run at Griffith Park on December 19, 2026, held on a marked dirt horse trail with aid at the turnaround. Registration includes a finisher medal, goodie bag, free photos and results posted after the event.

Forest and ridge single-track runs in Woodside, California with 10K, half, 35K and 50K options, chip timing, aid stations, and cupless hydration requirements.

A holiday trail event in San Diego with Marathon, Half Marathon, 10K and a new 6 Hour Hill Climb on Cardiac hill. Costume awards are given in solo and team categories.

A trail event on the El Dorado Trail in Placerville offering distances from a kids run to a half marathon, marked courses with aid stations, on-site registration, and medals for finishers.

Celebrate the final day of the year with a trail run at Lake Chabot in Castro Valley. Choose between half marathon, 10K, and 5K distances with options for runners and hikers alike.

A family-friendly 5K, 10K and half marathon around Lake Chabot in Castro Valley on January 1, 2027. The half marathon is part of the Brazen Ultra Half Series and includes varied trail terrain with notable climbs.