California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 389 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
May 2027
A race day in El Sobrante with a half marathon, 10K, 5K and a hiker division through the hills of Wilcat Canyon; registration windows and fees vary by distance.
Scenic Trail 10K at Big Bear Mountain Resort with high altitude pine singletrack, technical climbs and wide views of the Southern Sierra.
Mud Factor's Seriously Fun 5K mud and obstacle run returns to Mahon Ranch in Elk Grove on May 16, 2027, with adult and KIDZ family waves and required waivers for participants.
Participate in a 10K 30K or 50K trail run at Skyline Ridge Open Space Preserve to support cancer research at UCSF.
Trail races at Mission Trails in Santee offer 50K, 25K and 5K courses that move from daylight into night, organized by Endurance Race Series.
Community fundraiser at Big River State Park in Mendocino featuring 5K and 10K runs, a 5K walk, a kiddie race, river swim and paddle events.
Trail races at Diablo State Park in Clayton, CA, with distances from a 50 yard kids dash to a 50K, measured with a Rolatape surveyor's wheel.
Obstacle course weekend at Toro Park near Salinas with Sprint 5 km, Super 10 km, kids races and spectator options amid wooded hills and coastal weather.
Experience a high-altitude wilderness run through the San Gabriel Mountains with challenging 50k and 21k routes featuring pine forests and panoramic desert views.
Run the scenic creek trails of San Jose and enjoy a post race craft beer festival featuring local brewers, a beer mile, and finisher medals at Almaden Lake Park.
An 8 mile uphill race climbing 4,600 ft from Keeler to the historic Cerro Gordo town, finishing with a mountaintop barbecue, music, and shuttles back down. Spectator passes include the shuttle ride and food.
Trail races of 10K, half marathon, and marathon at Toro Park, Salinas on May 30, 2027, over rocky trails and dirt roads with summer temperatures around 16ºC and an average altitude of 520 meters.
June 2027
Trail runs of 31.1 miles and 12.4 miles through Sierra National Forest, with spaced aid stations, onsite pre-race lodging and dinner, and no pets on course or campus.
A trail running event in Malibu Canyon on June 5, 2027 offering distances from a half marathon to 100K on singletrack and fire road in the Santa Monica Mountains.
A vineyard trail run at Orfila Winery with 3, 6 and 9 mile routes on packed dirt and wine tastings for runners over 21.
Trail races from 50 yards to 50K through redwood forests in Joaquin Miller and Redwood Regional parks, finishing on the technical Cinderella trail.
Trail marathon relay and 8K in Griffith Park on June 6, 2027, featuring a true loop course, aid stations, festival atmosphere, chip timing and awards.
A paved out-and-back along the Truckee River Trail in Olympic Valley with Half Marathon, 8 Miler, and 5K options, aid stations, finisher medals, event shirts, and beer for those 21 and older.