Trail Running calendar near Big Bear Lake 2026-2027

9.1 miles to the Mt San Antonio summit with 3,926 ft vertical gain on steep, exposed mountain trails; course capped at 500 entrants in Angeles National Forest.

A multi-day trail running event in Big Bear Lake offering five distances, varied mountain terrain, and UTMB World Series Americas Major status.

Trail races in Cleveland National Forest offering 50 mile, 50K and 30K courses with significant elevation gain, staffed aid stations, drop bags, pacer rules and mandatory self sufficiency.

Annual mud run in San Bernardino with a 5K for individuals and teams and a 1K kids race on October 10, 2026.

Trail 5K and 10K at Chino Hills State Park on October 10, 2026. Registration runs April 6 to August 15 and includes race photos, a shirt and a finisher patch.

Ruff Run California on 10/17/2026 in Phelan, CA presents a 20 acre obstacle course for people and their dogs with over 20 obstacles, 4K and 1K options, and an after party with music, games and vendors.

Cahuilla Rez Ultra is a Native organized trail event on the Cahuilla Indian Reservation near Anza, California offering multiple fixed time and distance races on a 2 mile dirt loop. Proceeds support the Cahuilla Band of Indians Youth and Fam..

A trail running event in October at Hahamongna Watershed Park offering 5K, 10K and a hilly half marathon across mixed single track and fire roads.

Trail event at Los Coyotes Reservation with a 3.1 mile loop plus timed 6H and 24H ultras on a 15.7 mile course, with camping and village amenities.

A team trail relay at Los Coyotes Reservation on October 23-24, 2026 covering 112.8 miles and 23,800 feet elevation gain with camping and village amenities.

Wildwood Canyon Trail Run on October 24, 2026 in Yucaipa, CA features an 8-hour loop on a 3.7 mile course with about 600 ft climb per loop and a separate 6K on the same trail; aid stations and vendors are provided.

A multi-distance trail event at Lake Perris featuring 10, 20, 50, 100, and 200 mile courses, substantial elevation gain, aid stations, pacer rules, group camping, and cash prizes for 100 and 200 mile podiums.

Trail races at Caspers Wilderness Park on October 31, 2026 offering 10k, half marathon, 35k, marathon and 50k routes with marked courses and event support.

A trail event at Crystal Cove State Park on October 31, 2026 featuring a 4 mile loop with about 700 feet of climb per lap and ocean ridge views. The race is USATF sanctioned and part of the Southern California UltraRunner's Grand Prix Serie..

A trail event in Silverado, CA, with marathon, 25k, half and 10k courses routed from Black Star Canyon; the marathon has 4,244' of elevation gain and aid stations are placed along the route.

A nighttime 13.1 mile run through Joshua Tree’s desert trails under the stars; headlamp required and finisher medals awarded.

Fixed-time trail runs on an approximately 2.75 mile loop in O'Neill Regional Park with 3, 6 and 8 hour options through wooded canyons and varied terrain.

Trail running event in Yucaipa, CA on November 14, 2026 offering 21 mile, 10 mile and 4 mile courses with 10 percent of fees donated to the local conservancy.

Trailsgiving at Elysian Park on November 14, 2026 features marked out and back trail routes on hard packed dirt with hills. Distances include 5k, 10k, 15k, and a half marathon with on-course aid and finisher medals.

Friendsgiving at Whittier Narrows offers 5k, 10k, 15k and Half Marathon options on Nov 15, 2026 with marked out and back loops, aid station, medals and race photos.