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 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.

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.

A Thanksgiving morning trail event in the Santa Monica Mountains offering a half marathon, 10k and 5k, with fire road and singletrack courses, finisher medals, race photography, a post-race beer garden 21 plus and a taco breakfast.

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.

A Last Person Standing race in Yucaipa, CA on December 11, 2026 where runners repeat a 4.167 mile loop each hour until one person remains.

A trail running event at Crystal Cove State Park in Newport Beach on December 12, 2026 offering 15K, 6K and a Kids 1K. The 15K includes a $2,000 prize purse and multiple aid stations on marked singletrack.

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.

A holiday-themed Reindeer Run at Griffith Park on December 19, 2026, with 5k, 10k, 15k and half marathon options on a marked dirt trail and an aid station.

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.

A 24 hour loop ultrarun at Lake Perris on Jan 29, 2027 offering individual and four person team competition over a 4 mile plus loop.