California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 370 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
January 2027
Kickstart the new year with a trail run at Overlook Park featuring 5K, 10K, and 10 mile distances along with collectible medals showcasing the history of Auburn.
A New Year event at Granite Beach featuring a 2 mile run 5 mile bike 2 mile run duathlon and a 5K trail run with lake views. Awards include overall champions and age group prizes.
Multi-distance trail event at Almaden Quicksilver County Park on January 2, 2027, with dirt-road courses, aid stations, drop-bag service, and published time cutoffs.
Trail races in Malibu on January 2, 2027 offering 50K, 20K, 10K and 5K distances; registration closed August 31, 2026.
A January trail event on Catalina Island featuring the historic Avalon 50 Mile, a 50K, and the Catalina Island TRIPLE CROWN Challenge.
A trail race day in Escondido with distances from 1 mile to 50 miles, relay and youth options, a summit challenge, valley course, and cupless aid stations.
Community 5K run and walk at East La Loma Park Modesto on January 9 2027 with proceeds benefiting Sole Support; registration opens March 1 2026 and closes November 1 2026.
Scenic trail races at Granite Beach with 5K and 12K courses, local craft beer for those over 21, post-race food, commemorative gear and age-group awards.
Trail race in Auburn, CA offering 8K, Heavy Half, 35K and 50K on sections of the Western States and Wendell T. Robie trails.
Multiple trail races on 01/17/2027 at Huddart Park, from a 50 yard kids dash to 50K, set among redwoods, ferns and trails at King's Mountain and Bear Gulch.
A weekend of Spartan obstacle races at Lake Perris with 5K, 10K, 21K and kids races on a flat, scenic course near Perris, California.
La Cuesta Ranch Trail Run takes place in San Luis Obispo on January 23, 2027 and offers 10 km, 20 km and 30 km trail distances as part of the AllWeDoIsRun event calendar.
Two-day trail event in San Francisco on January 23-24, 2027 offering 15K, 25K, 50K and 50 mile courses through the Marin Headlands and over the Golden Gate Bridge.
A multi distance trail event at Folsom Lake on mostly single track trails, with races from a kids run up to a newly added 38 mile ultramarathon.
Trail 10K and 5K at Granite Beach, Folsom Lake with aid stations, finisher medals, pre-order shirts, age-group awards, and a no-refund policy with limited transfers.
Trail races in Pacifica on twisty single-track with 10K, half marathon, and 30K options, chip timing, substantial elevation, and cupless aid stations.
Trail races at Lake Hodges in Escondido with 50K, half marathon, 10K and 5K on dirt singletrack and service roads plus a three-race DemiGod challenge.
30K and 50K trail races at Historic Calico Ghost Town in the Mojave Desert on January 24, 2027.
A 24 hour individual and team trail race in Perris, CA featuring a repeated 7 mile loop with 1,631 ft of climbing and a relay option for four runners.
Mixed-surface runs at Coyote Hills Regional Park with 5K, 10K and half marathon options, stocked aid stations and GPX course files available.