Trail Running calendar near Castaic 2026-2027

Trail ultras on Mt. Wilson in the Angeles National Forest offering 25K and 50K distances, technical single track, marked aid stations, panoramic views, and enforced cutoffs.

Trail races of 50K, 30K and 15K around Corriganville Park in Simi Valley with sandstone outcrops, oak savannahs, water sources and mountain and ocean views. A portion of proceeds supports the Challenged Athletes Foundation.

A themed run in Long Beach on September 27 with Half Marathon, 10K, 5K, a family mile and kids dash, ocean views, chip timing and a pizza themed finish line festival.

An annual 100 mile trail race through the San Gabriel back country in the Angeles National Forest, held since 1986. The 2026 edition uses a revised course with start and finish in Altadena and is a Western States and UTMB qualifying race.

A 9.1 mile mountain trail race at Mt Baldy on October 3, 2026, featuring 3,926 feet of vertical gain. Multiple divisions offer gear and cash prizes, timing with a disposable chip, and the event is capped at 700 entries.

A 5K at Ernie Howlett Park on the Palos Verdes Peninsula with a shaded horse-trail course, in-person and virtual options, and a fundraising entry where raising $100 covers registration and benefits Strides in Recovery.

Trail races of 50 Mile, 50K and 30K through Cleveland National Forest near Silverado CA on remote forest roads with significant climbing, staffed aid stations, drop bag support, and specific crew and pacer rules.

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.

Trail races at Vasquez Rocks in Agua Dulce on October 17, 2026 offer looped 5K, 10K, 15K and Half Marathon+ courses across rocky, sandy and single track terrain. The 15K and Half Marathon+ include a roughly 500 foot black hole tunnel.

Trail races at Hahamongna Watershed Park on October 18, 2026 offering half marathon, 10K and 5K distances. The half marathon is presented as the organizer's flagship trail event and is reported to sell out quickly.

A trail running event in Chesebro Canyon near Agoura, California offering 50K, a trail half marathon and a 5k on varied singletrack and fire roads. Aid stations, finisher medals, post-race tacos and a beer garden for ages 21 and up.

A multi distance trail event on the Gaviota Coast near Santa Barbara, with routes to Gaviota Peak and ridgelines. Distances range from 12 kilometers to 100 miles and proceeds support local trail maintenance.

Trail races from Black Star Canyon near Silverado, CA, with marathon, new 25k, half and 10k distances; marathon gains 4,244 ft and multiple aid stations are located along the route.

Trail races on Rancho San Fernando Rey in the Santa Ynez Valley feature mountainous ranchland, creek crossings, vineyards, oak groves, and views of Loma Alta Mountain. Distances include 51 KM and 25 KM.

A long distance trail event in Malibu covering about 70 miles with roughly 13,000 feet of elevation gain and a 36 hour time window, with a required dry pack weight of 25 pounds and both paid and volunteer ticket options.

A mud and obstacle focused 5K at Oak Canyon Park in Irvine on November 21, 2026, featuring mud pits, walls, ropes, monkey bars and a festival area with vendors and food.

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.

Trail races in the Santa Monica Mountains on Thanksgiving offering a half marathon, 10k and 5k on fire roads and singletrack, with finisher medals, free photography, breakfast and a 21 plus beer garden.

Celebrate Thanksgiving morning with a scenic 5K or 10K run along Huntington Beach to fund clean water projects for communities in need around the world.

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.