Trail Running calendar near Green Valley Lake 2026-2027

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.

Ultrarunning on a 2 mile loop at Cahuilla Indian Reservation in Anza with multiple race formats, camping, aid stations, and fundraising for tribal youth programs.

Trail running at Vasquez Rocks Natural Park in Aqua Dulce, CA with 13.9 mile, 15K, 10K and 5K race options on October 17, 2026.

A trail event at Hahamongna Watershed Park offering 5K, 10K and a half marathon with marked courses, chip timing, aid stations and commemorative wooden medals.

A 200-mile, multi-day endurance run around San Diego County with an 82-hour cutoff, required crew support, rugged terrain, and a limited 24-runner field.

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.

Trail team relay at Los Coyotes Reservation in the Anza-Borrego area on Oct 23 to 24, 2026, featuring several team formats and a 112.8 mile course.

At Wildwood Canyon State Park in Yucaipa, the event offers an 8 hour timed loop and a 6K on a 3.7 mile loop with about 600 ft vertical gain.

A multi-distance ultramarathon at Lake Perris featuring 10, 20, 50, 100 and a demanding 200 mile race with looped courses, aid stations, camping and cash prizes for top finishers.

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..

Trail marathon and new 25k in Silverado, CA with routes from Black Star Canyon through Mariposa Reserve and significant elevation gain.

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

Night trail running at Marvin Braude Mulholland Gateway Park with marked 5K and 10K courses and required headlamps.

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 event in Yucaipa with 21, 10, and 4 mile courses; 10% of registration fees support the Crafton Hills Open Space Conservancy.