California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 375 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
October 2026
A looped trail event in Lassen National Forest on an about 4.8 mile course with 48 hour, 24 hour and 12 hour formats, a burro race, aid station and awards.
Trail Backyard Ultra at Beals Point uses a 4.16 mile loop run every hour until one runner remains, with a 12 hour capped mini event available.
Backyard ultra at Beals Point, Granite Bay where runners repeat a 4.16 miles loop each hour until one remains, with a 12-hour Mini option and on-site aid at the start line.
A multi day 200 mile endurance run around San Diego County in Escondido with an 82 hour cutoff, required crew support, and limited entry for experienced ultrarunners.
Trail event at Los Coyotes Reservation offering a 3.1 miles Yellow Loop plus timed 6H and 24H ultras on desert mountain trails with camping at Ragnar Village.
A team trail relay at Los Coyotes Reservation in Warner Springs CA on Oct 23 to 24, 2026 across desert and mountain trails with notable elevation gain.
Trail events at Wildwood Canyon State Park near Yucaipa, CA featuring an 8 hour loop race and a 6K on the same 3.7 mile course.
A remote, unmarked backcountry foot race at Oxbow Reservoir, CA offering three routes from about 15 to 43 miles with large elevation gain.
Trail races in Cheeseboro Canyon offering 50k, half-marathon, and 10k courses with varied singletrack, aid stations stocked by Skratch Labs, and post-race festival amenities.
Multi-distance trail event on the Gaviota Coast with ocean views, ridge climbs, varied terrain and options from 12K to 100 miles.
Experience the autumn scenery of Jenkinson Lake at the Trail Run at Sly Park. This event offers distances from a 5K to a 50K ultra on shaded pine forest trails with rolling hills and lakeside views.
Trail half marathon and 10K at Salmon Falls Ranch near Pilot Hill CA on singletrack with creek crossings and aid stations; proceeds benefit the American River Conservancy.
Trail marathon, half, 10K, 5K and virtual options in Bothe-Napa Valley State Park on October 24, 2026; field limited to 300 participants.
Trail races at Redwood Regional Park offering 35K, half and 10K options on technical dirt trails with marked courses, chip timing, cupless aid stations, and limited field size.
A rugged half marathon on Santa Cruz Island featuring oak canyons, five creek crossings, steep climbs and exposed ridge running. Organized by Ventura County Sheriff’s Search and Rescue, proceeds benefit SAR charities and entry includes boat transport..
A women’s trail half in the Marin Headlands covering 13.6 miles and 2,156 feet of climbing with aid stations, shuttle service, training support, childcare grants, and a $25,000 prize purse.
A cross country meet at Radke Martinez Regional Shoreline on October 24, 2026, featuring three races of about 4.1 miles over grass, dirt, and path surfaces.
Virtual worldwide challenge and an in-person gathering at the San Francisco Ferry Building on October 24, 2026, fundraising for the Breast Cancer Research Foundation.
A family-friendly themed run in Pebble Beach with zombie costumes, multiple distances, an emergency preparedness fair, and post-race food.
Halloween themed 5K and 1 Mile run and walk at Pianetta Winery on October 24, 2026 with wine tastings, chip timing, costume contest, and a 5 in finisher medal.