Trail Running calendar near Simi Valley 2026-2027

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 community endurance event in Bakersfield on 11/21/2026 where a 4.2 mile loop starts each hour. Participants can run one loop, repeat loops through the day, or attempt twelve loops for about 50 miles with aid and free parking provided.

A Thanksgiving Day community run in Santa Clarita offering a 5K cross country course through Central Park and a 1K for children. The event benefits the Santa Clarita Track Club and awards medals to the first 600 competitors.

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.

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 running event at Point Mugu State Park in Malibu on December 5, 2026, offering 50-mile, 50K, and 30K options with listed entry prices.

Nighttime trail race in Tarzana on Dec 5, 2026 offering 5K and 10K courses with elevation gain, required headlamp, cupless aid stations, and post-race awards.

Holiday-themed Jingle Bell races in Valencia on December 6 offering 5k, 10k, 15k and a half marathon on marked looped trails with aid stations and finisher medals.

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.

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

A trail running event centered in Avalon, Catalina Island offering a 50 Mile, a 50K and a TRIPLE CROWN Challenge across the length of the island with ocean views, aid stations and volunteer support.

A 68-mile trail ultra across the Backbone Trail in the Santa Monica Mountains on Jan 16, 2027, capped at 200 runners; solo entrants need a prior 50-mile finish and relay teams are allowed.

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 in Calabasas on January 30, 2027 offering 100K, 50 mile, 50K, marathon and 30K distances with varied entry fees.

A trail event in Big Dalton Canyon offering a **50K solo**, a 4-person 50K relay, and a **10K loop**, with over 9,000 feet of elevation and proceeds to the Wildland Firefighter Foundation.

A multi-distance event in Griffith Park with a flat, shaded 5K, a half marathon across major park trails including a final peak reward, an on-site expo and food trucks, and varied registration fees by race.

Multiple distance trail races at Griffith Park on February 14, 2027 featuring dirt trail loops, an aid station, finisher medals, and group discounts.

Timed 24 hour, 12 hour and 6 hour events plus set distances on a 2.2 mile loop at Will Rogers State Park in Pacific Palisades, CA, with relay and crew options.