California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 371 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
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 and routes through Los Padres National Forest on Oct 24 to 25, 2026.
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 marathon in the Marin Headlands featuring a 13.6 mile course with 2,156 ft of climbing, four aid stations, 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.
An independently run evening cross country race on October 24, 2026, noted for a very steep opening mile, six-year age divisions, and volunteer-supported timing and navigation.
Community 5K in San Lorenzo Park, King City on October 24, 2026, with $45 registration, early packet pickup, and sold-out shirts and tote bags.
In-person and virtual 5K in Los Angeles on Oct 25, 2026 supporting dyslexia education, with a flat dirt trail, race bibs, refreshments, and free parking.
A team relay across San Francisco trails covering nearly 13 miles and over 2,000 feet of elevation, with five segments and teams of up to five runners for a $50 entry.
A trail run by Bay Area Run Crew at Stevens Creek Reservoir featuring varied terrain, trail-ready gear recommendations, and a post-run social at Voyager Craft Coffee.
A multi distance trail event at Lake Perris, CA featuring a 200 mile course with 44,000 feet of elevation and timed cutoffs.