Trail Running calendar near Green Valley Lake 2026-2027

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.

Trailsgiving in Elysian Park offers 5k, 10k, 15k and a half marathon on marked out and back trail loops with on course aid and finisher medals.

Looped 5k, 10k, 15k and half marathon on the shared park trails of Whittier Narrows in South El Monte on November 15, 2026.

An obstacle and mud-focused 5K at Oak Canyon Park in Irvine on Nov 21, 2026, featuring mud pits, walls, ropes, a festival village, and packet pickup the day before.

Trail running event in Griffith Park, Los Angeles on Nov 21, 2026, offering multiple distances from 10K to 50K and organized by Keira Henninger Events.

Thanksgiving morning trail races in Los Angeles with a half marathon, 10k and 5k through the Santa Monica Mountains, finishers' medals, aid stations and a beer garden.

One mile loop ultra on hardpacked dirt with timed 3, 6, 12 and 24 hour options plus relay teams. Live chip timing, free on course camping, continuous food service, and a 31 hour buckle challenge to reach 100 miles.

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.

Trail 5K and 10K at Elfin Forest Recreational Reserve with chip timing, a 1K kids run, a 10K team competition, and proceeds shared with local conservancy.

A Last Person Standing race in Yucaipa, CA on Dec 11, 2026 with hourly 4.167-mile loops on rugged foothill terrain; limited camping and a published entry fee.

Trail races at Crystal Cove State Park on December 12, 2026, featuring a prize-backed 15K, a 6K and a Kids 1K with shirts, medals, aid stations and post-race amenities.

Trail races at Daley Ranch near Escondido with 10 Mile, 10K and 5K courses on single track and dirt roads; the 10 Mile reaches Stanley Peak for a 360 degree view and the event limits entries to 300 runners.

Holiday themed races at Griffith Park on December 19 2026 offering 5K, 10K, 15K and half marathon distances on a shared dirt trail.

Experience a diverse trail running event in Escondido featuring everything from a 50 mile ultra to a stroller friendly 5k. Explore the valley floor or climb to the summit of Raptor Ridge in this cupless race series.

Two days of obstacle racing at Lake Perris with Sprint 5 km, Super 10 km, Beast 21 km and kids races on a flat, fast course with mountain views.

Trail run and hike events in Griffith Park on January 24 2027, featuring 8M, 8K, 5K and a 2.2K kids run with marked courses, aid stations, participant shirts and finisher medals.

Trail events in Griffith Park on January 24, 2027, including an 8 mile out and back to the Hollywood Sign viewpoint, an 8K, a 5K, and a 2.2K kids loop with aid stations, timing, shirts, and finisher medals.

Trail races at Lake Hodges offering 50K, half, 10K, 5K and a combined Hercules DemiGod Challenge with varied elevation and mapped courses.

Trail races of 30K and 50K through the historic Calico Ghost Town and Calico Mountains on Sunday, January 24, 2027.