Trail Running Calendar California 2026-2027

Experience the trails of Clayton at the Diablo Summit Challenge. Run a 22.5 km course starting at Mitchell Canyon Road and support local community initiatives through this outdoor adventure.

Join the 11th annual Mighty Dog Trail Runs at Folsom Lake featuring 10K and 5K distances. Runners and walkers can compete with their dogs for finisher medals and special canine bandanas on scenic granite trails.

The Lag Bon 10K is a trail race in Fairfax, CA, on March 22, 2026. This run supports clean water access and features a scenic, technical course around Marin's reservoirs.

Run through the Skyline Ridge Open Space Preserve on a scenic course featuring coastal views and gentle hills. All proceeds and matched entry fees support medical aid programs via The Hatuey Project.

The Coast to Crest offers a flat and fast 10K and 5K on hard-packed trails in Del Mar. Runners enjoy spectacular lagoon views and a downhill finish. It's the final championship qualifier for the series.

Run a flat and fast course on the historic Western Pacific Trail in Fremont. Choose from a half marathon, 10K, or 5K starting at Quarry Lakes. The event is open to runners and walkers of all levels.

Run on the historic Western States trail at the Knickerbocker Canyon Trail Run. Choose from four distances, from a 5K to a challenging 35K, all starting from American River Overlook Park. The course features river views, the iconic No Hands..

Experience the 16th annual spring edition of this trail event in Los Angeles. Runners can choose from multiple distances including a new 50 mile ultra and family friendly 10k routes through Griffith Park.

Run the single-track trails alongside Folsom Lake in El Dorado Hills. The event offers four distances from a 5K to a half marathon, with technical sections and scenic views. All finishers receive a medal.

An urban race in Fresno on March 29, 2026 that combines stadium stair climbs, runs through parking garages and a half mile street segment to finish with a 220 step ascent to the top of The Grand Tower. Donations benefit the Alisa Ann Ruch B..

Run along the scenic Pacifica coastline in the Mori Point 7K. This event features a flat course through the Mori Point National Recreation Area using a mix of trails and paved paths.

Tackle the trails in the Cleveland National Forest near Silverado with the Billy Goat Mountain Climb. Choose from three distances, all featuring significant elevation gain, including a local favorite 17-mile loop. Aid stations and shuttles..

This scenic trail run offers marathon, half marathon, and 10K distances through the panoramic Marin Headlands. The course features stunning views of the Golden Gate Bridge, San Francisco Bay, and the Pacific Ocean. With a limited field of 4..

The Diablo Trails Challenge offers four trail distances on Mount Diablo. A portion of entry fees supports the conservation work of Save Mount Diablo. The half marathon is part of the challenging Brazen Ultra Half Series.

The American River Endurance Runs offer three distances: 50, 25, and 10 miles, all finishing in Auburn. The 50-mile race is one of the largest of its kind in the US. Runners are supported with aid stations and celebrated at the finish with..

This trail run or hike in Laguna Beach's El Moro Canyon offers a 6K or 10-mile course with ocean views. Participants receive a shirt, medal, and photos. Parking at the state park costs $15.

Experience the scenic Merced River Canyon with a choice between a flat five mile run or a nine mile hill climb on hardpacked unpaved roads.

Hop into spring with the Hoppy Easter runs at Griffith Park. Choose from four distances on a scenic dirt trail course, from a 5k to a half marathon. Every finisher gets a custom medal, and the event includes free photos and a friendly atmos..

Santa Barbara Tough Enough The Santa Barbara Tough Enough is a 59-mile event that runs mostly along the Transverse Range ridgeline. It starts at Toro Canyon Park in Montecito and finishes at Nojoqui Falls Park near Solvang. The course is ru..

Experience the scenic beauty of Agoura Hills at this long running event featuring road and trail races. Choose from distances ranging from 1 mile to a half marathon with a celebratory post race atmosphere.