Trail Running calendar near Simi Valley 2026-2027

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.

A trail race at Vasquez Rocks in Agua Dulce on October 17, 2026 offering Half Marathon+, 15K, 10K and 5K loops through rock formations, canyons and a 500 foot tunnel on the Pacific Crest Trail with multiple aid stations.

A trail running event in October at Hahamongna Watershed Park offering 5K, 10K and a hilly half marathon across mixed single track and fire roads.

Trail running in Chesebro Canyon near Agoura with a 50K, a half marathon and a short trail race; courses feature singletrack, fire road climbs, stocked aid stations and post race food with a beer garden for 21 plus.

Multi-distance trail races on the Gaviota Coast feature ocean and valley views on October 24 and 25, 2026. Distances range from 12 km to 100 miles and courses include aid stations and on-course EMT support.

Santa Cruz Island EcoExtreme 2026 is a 13.1 mile wilderness trail run on Santa Cruz Island in Channel Islands National Park. The non profit event has limited entries regulated by the National Park Service and includes boat transport and on..

A timed trail event at Crystal Cove State Park in Laguna Beach on October 31, 2026, offering 6 hour and 4 hour options, with a parking fee that is card only and a no refunds or transfers policy.

Trail and gravel running events in Bakersfield, California on November 6, 2026. The Rock Cobbler Run pairs trail running with gravel rides and includes photo galleries, results and several event support pages.

A trail running event in Silverado, CA rerouted to Black Star Canyon with four distances including a new 25k. The marathon features significant climbing and multiple aid stations along creekside trails, switchbacks and ridge sections.

Run through the historic streets of Avalon and the rugged interior trails of Catalina Island. Choose between a half marathon, 10K, or kids fun run featuring stunning Pacific Ocean views and island landmarks.

The Pacific Trails California by UTMB will take place in Lake Los Carneros from Saturday 14 November 2026 to Sunday 15 November 2026.

A 30th annual community 3.14 mile run in Ventura on November 15, 2026, held on a new course with online registration only. The event aims for zero waste and includes a Patagonia store bib discount the week after the race.

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.

An obstacle and mud focused 5K at Oak Canyon Park on November 21, 2026 featuring mud pits, walls, ropes and monkey bars, plus a finish line festival. Registration includes value and VIP package options.

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.

A Thanksgiving morning trail race in the Santa Monica Mountains with half marathon, 10k and 5k options, ocean and valley views, finisher medals, free course photos, a beer garden and taco breakfast, and a canned food drive for the West Vall..

A Thanksgiving morning 1K, 5K and 10K along Huntington Beach that passes the pier and Surf Museum. Participants support clean water projects with 85% of every dollar raised going toward drilling wells.

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.

Ray Miller 50/50 in Malibu on December 5, 2026 offers three trail distances: 50 Miler, 50K and 30K. Registration opens April 1 and closes June 1.

A night trail race in Tarzana on December 5, 2026, with lighted routes through the Santa Monica Mountains. Offered as 5K and 10K, the event has notable elevation, aid stations, required headlamps, and post race medals and shirts.