Trail Running Calendar California 2025-2026

The Lake Miramar 4 Mile is a scenic, untimed fun run held at Lake Miramar in San Diego, CA. Part of the Rewind Series by ERS, this event features a 4-mile out-and-back course combining paved roads and trails along the lake's beautiful shores. Designed for a relaxed, family-friendly atmosphere, it of..

The San Diego 100 is a challenging 100-mile ultramarathon held in the mountainous east county of San Diego, California, starting and finishing at Lake Cuyamaca Recreation Area. The course is a 90% single-track loop traversing four recreational areas, including sections of the Pacific Crest Trail, No..

The Malibu Canyon Trail Races, presented by Keira Henninger, take place in Malibu, California, within the scenic coastal Santa Monica Mountains. This challenging event offers multiple distances including 100K, 50-mile, 50K, 30K, and a half marathon, all run on single track and fire roads through rid..

The SF Half Day is a unique running event taking place in San Francisco, featuring various race formats including 3-hour, 6-hour, and 12-hour options for both solo participants and teams. The course is a scenic one-mile loop around Crissy Field, offering stunning views of the Golden Gate Bridge and..

The Mt Umunhum Ultras is a challenging trail running event held in San Jose, California, featuring multiple race distances including 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, and 5K. The course traverses the scenic Santa Clara Valley, Sierra Azul Open Space Preserve, and Santa Cruz Mount..

The Mississippi Bar Trail Run, hosted by the Fair Oaks Recreation & Park District, is an annual trail running event held in Fair Oaks, California, on the north shore of Lake Natoma. The race features scenic courses through wetlands, oak-studded bluffs, and historic gold mining terrain. Participants..

The China Camp Trail Run is a scenic trail running event held at China Camp State Park in San Rafael, California. It offers three race distances: 5K, 10K, and a half marathon, featuring moderately technical dirt trails and fire roads with elevation gains of 315', 750', and 1,400' respectively. Runne..

The Grasshopper Peak Redwoods Run is an annual trail running event held in Humboldt Redwoods State Park near Weott, California. Celebrating its 10th year, the race offers two distance options: a 30K and a 10.5-mile run. Both courses feature a challenging climb up Grasshopper Peak followed by a sceni..

The Shadow of the Giants 50k & 20k Fun Run is an annual running event held in Fish Camp, California, near Yosemite National Park. Scheduled for June 7, 2025, this race offers participants the choice between a 50k and a 20k distance, with an early start option available. Runners will traverse the sce..

The Griffith Park Trail Marathon Relay & 8K is a celebrated running event held at Park Center in Griffith Park, Los Angeles. Recognized by Runner’s World as one of the "10 Best Races You’ve Never Heard Of," it offers both a marathon relay for teams of up to five and an 8K race for solo runners. Part..

The Black Star Canyon 5k Trail Run takes place at Black Star Canyon in Silverado, California. The 3.3-mile course features a mix of fire roads and single-track trails with an elevation gain of 390 feet, offering a moderately challenging run through scenic terrain. The race starts and finishes at the..

The Tahoe 200 is a challenging 200-mile endurance run around Lake Tahoe, the largest alpine lake in North America. The course primarily follows the Tahoe Rim Trail, offering runners breathtaking views of clear blue waters, aspen meadows, rock gardens, small alpine lakes, dense forests, and expansive..

The Cool Moon 100 Mile Endurance Run is a challenging ultramarathon held in Cool, California. The race features a 100-mile course composed of four loops of two distinct trails: a 13.5-mile North loop and an 11.5-mile South loop, combining single track and fire roads with a total elevation gain of ap..

The Holcomb Valley Trail Run, held annually in Big Bear Lake, California, offers runners three challenging distances: 33 miles, 14 miles, and 7 miles. The race course features scenic sections of the Pacific Crest Trail and Forest Service roads through Holcomb Valley, with significant elevation gains..

The Skyline Ridge Trail Run, held in La Honda, California, offers two distances: a 50K ultramarathon and a 21K half marathon. The courses traverse the scenic Skyline Ridge, Russian Ridge, and surrounding open space preserves, featuring diverse terrain including narrow hiking trails, ranch roads, eve..

The Cool Moon Trail Races, held in Cool, California, offer a variety of distances including 100K, 50-mile, 25-mile, 13.5-mile, 11.5-mile, and 5K races. The course features two main loops: a 13.5-mile North loop and an 11.5-mile South loop, combining single track trails and fire roads with scenic vie..

Dirt Circus - San Francisco is a free community running event held in San Francisco, California, celebrating local trail running culture. Organized by UltraSignup, this one-day festival features a social group run with options of 3.2 or 4.5 miles, welcoming all paces and encouraging participants to..

The Yosemite: Tuolumne Meadows running event offers a multi-day alpine trail running experience in the High Sierra, featuring distances from 40 to 98 miles over four days. Set amid glacier-carved domes, peaks, and pristine lakes, the course traverses rugged terrain with significant elevation gain, i..

The Broken Arrow Skyrace, held at Palisades Tahoe near Lake Tahoe, California, is a premier four-day skyrunning event featuring nine challenging mountain races. Scheduled for June 19-22, 2025, it offers distances from a kids' race to a grueling 46K ultra, including the Vertical Kilometer Ascent, 11K..

The Orange Curtain Endurance Run takes place in Cerritos, California, featuring distances of 100K, 50K, 30K, marathon, 24-hour, 12-hour, 10K, and 6-hour events. The course is a mostly flat 10 km out-and-back loop along the San Gabriel River bike path, combining asphalt and dirt surfaces, repeated mu..