Trail Running Calendar California 2026-2027

The Bad Ass Backyard Ultra tests endurance with a relentless hourly loop format in Rio Linda. Complete a 4.16-mile loop every hour to stay in the race. As an official Backyard Ultra, it offers a path to national and world championship quali..

Experience a fast and flat trail race at the 10th Annual Coast to Crest 10K and 5K in Del Mar. Enjoy wide open lagoon views and a downhill finish on a well groomed dirt course.

Experience a piece of railroad history at this event in Fremont's Quarry Lakes Regional Recreation Area. Run a flat course on the historic Western Pacific Trail with distances including a half marathon, 10K, and 5K.

Knickerbocker Canyon is a trail event in Auburn, California offering 5K, 10K, half marathon and 35K routes on the Western States trail. Courses feature technical single track and fire roads, marked routes, timed results and cupless aid stat..

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.

Experience a mud filled obstacle course at Oak Canyon Park in Irvine. Join the community for a day of mud pits and festival celebrations while supporting local charities through the Buy One Give One program.

Trail races from 5K to half marathon run on single track around Folsom Lake from the Falcon Crest parking area. Courses are marked with colored ribbons and feature dirt and rocky surfaces with rolling hills and some technical sections.

Experience an urban obstacle course featuring stadium stairs and a six story garage run. Finish the three mile route by climbing 220 steps to the top of a ten story tower in downtown Fresno.

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.

Experience an obstacle course weekend at Woodward Reservoir Regional Park near San Jose. Choose from distances ranging from a 5k Sprint to a 50k Ultra on a flat course designed for personal performance.

A trail race near Silverado CA offering a 17 Miler, a half marathon and a 10K with significant elevation gain. Courses follow Maple Springs Road and truck trails and include multiple aid stations and shuttle logistics.

A multi-category lap endurance event on private farmlands in Reedley, California offering timed formats and a 100 mile option. The dirt farm road course is clearly marked, with aid stations, chip timing, camping, and relay and pacer options..

Experience a scenic trail run through the Marin Headlands with panoramic views of the Golden Gate Bridge and Pacific Ocean. Choose between 10K, half marathon, and marathon distances on a course featuring wildflower lined trails.

Experience the scenic beauty of Mount Diablo with trail races ranging from 5K to 50K. Support local land preservation while enjoying a professional event featuring a post race BBQ in Walnut Creek.

Experience one of the largest 50 mile endurance runs in the United States. Choose between 10, 25, or 50 mile distances through scenic Northern California finishing with celebratory festivities in Auburn.

Experience the trails of Crystal Cove State Park with a 6K or 10 mile run or hike. Enjoy views of the Pacific Ocean and receive a finisher medal and event shirt as you navigate the terrain of El Moro Canyon.

Experience the scenic Merced River Canyon on hardpacked trails with two distinct options. Choose between a fast flat course along an old railroad grade or a demanding switchback hill climb with significant elevation gain.

Join this spring event at Griffith Park featuring distances from a 5k to a half marathon on a scenic dirt trail course. Enjoy a relaxed atmosphere with finisher medals and free race photos for all participants.

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..

A free, social, non-competitive trail run at El Moro and Laguna Coast Wilderness Park in Newport Beach on April 4, 2026. The route is about 5 miles with roughly 500 feet of climbing and includes post-run snacks and a raffle.