Trail Running Calendar California 2024-2025

The Santa Barbara Nine Trails is a trail running event organized by AllWeDoIsRun, set to take place in Santa Barbara, California. This event features two race distances: a challenging 35-mile course and a shorter 17-mile option, catering to various skill levels. The event is designed to showcase the..

The Folsom Lake Southside Trail Run is an exciting trail running event taking place in Folsom, California, featuring a variety of distances including 50K, Marathon, 25K, Half Marathon, 7.5 Miler, and 5K. The race predominantly follows a scenic single track trail that runs alongside Folsom Lake, offe..

The Ruck a Chuck 50K is an exhilarating trail running event set in the stunning Sierra Nevada foothills of Foresthill, California. Participants will navigate a challenging out-and-back course that showcases the breathtaking beauty of the region, including sections of the historic Western States Trai..

The Nine Trails 35 Mile Endurance Run is a challenging trail running event set to take place in Santa Barbara, California, on March 15, 2025. This demanding course features over 10,000 feet of elevation gain and descent, making it comparable to a tough 50-mile run. Participants will navigate steep, ..

The Pirate's Cove 6/12/24 Hour Run/Hike is an exciting endurance event taking place at Lake Cuyamaca, CA, on March 21, 2025. Participants can choose to run or hike for 6, 12, or 24 hours, making it suitable for various skill levels. The event includes a mandatory access fee, which is covered in the ..

The Redwood (Spring) Trail Run is an exciting running event taking place in Oakland, California, featuring a variety of race distances including a 5-mile, Half Marathon, 30K, Marathon, and 50K, along with youth categories and a free Kid's Run. Set against the stunning backdrop of Redwood Regional Pa..

The Napa Valley Trail Marathon, Half Marathon, and 10K is a scenic running event taking place in Bothe-Napa Valley State Park, California, on March 22, 2025. Celebrating its 33rd year, the event features challenging courses with beautiful landscapes, including hills, streams, and rocky trails. Parti..

The South Hills Single Track Trail Run - Spring is an exciting trail running event taking place at Calero County Park in San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, Half Marathon, and shorter options down to a Kids Run. The course features scenic si..

The VALENCIA Trail Race, scheduled for March 22, 2025, offers an exciting opportunity for runners to experience the stunning trails and challenging hills of Valencia, California. Participants can choose from three race distances: a 50K Ultra, a Half Marathon, and a 10K. The course features singletra..

The Bad Ass Backyard Ultra, organized by Skybreaker Racing in collaboration with Auburn Area Trail Runners, is a unique running event held at Dry Creek Parkway in Rio Linda, California. Participants must complete a 4.16-mile loop within one hour, with new loops starting every hour on the hour. Runne..

The Big Alta is an exciting trail running event taking place in Marin County, California, organized by Freetrail and Daybreak Racing. Participants can choose between two challenging distances: a 50K and a 28K, both featuring scenic single-loop courses that showcase breathtaking views of the San Fran..

The Knickerbocker Canyon Trail Run, organized by Inside Trail Racing, offers a challenging and scenic experience for runners of all levels on March 22, 2025, at American River Overlook Park in Auburn, CA. Participants can choose from four distances: 5K, 10K, Half Marathon, and 35K, all featuring var..

The Rattlesnake Dick event features a thrilling race experience with 50K, 25K, and 10K distances, set against the scenic backdrop of Cool, California. Participants can enjoy a generous 10-hour cut-off for the longer distances, with all finishers receiving a stylish event shirt and a high-quality med..

The Western Pacific event features a half marathon, 10K, and 5K, taking place in Fremont, California, on March 29, 2025. Organized by Brazen Racing, this race offers a flat and fast course, ideal for runners and walkers of all levels. The route utilizes the historic Western Pacific Trail, originally..

The Folsom Lake Falcon Crest Trail Run is an exciting running event set in the scenic foothills of El Dorado Hills, California. Participants can choose from various distances, including a 5K, 10K, 8-mile, and half marathon, all featuring beautiful single-track trails alongside Folsom Lake. The cours..

The Terrible, Horrible, No Good, Very Bad Day 50K is a unique ultrarunning event taking place on March 29, 2025, in Los Gatos, California. This non-supported, fatass run features challenging trail options, including a 50K with a significant elevation gain of 10,900 feet, requiring participants to co..

The Montana de Oro Trail Run, set for March 29, 2025, is a celebrated annual event held in Montaña de Oro State Park, California. Participants can choose from four distances: a challenging 50K featuring three peaks, a 36K with two peaks, a half marathon, and a 12K. The scenic courses offer breathtak..

The Lag Bon 10K is a trail running event taking place in Fairfax, California, on March 30, 2025. This moderately challenging course features beautiful trails around Marin County's reservoirs, with an elevation gain/loss of approximately 400 feet. The event aims to raise funds and awareness for the g..

The Beyond Limits Ultra (BLU) is a unique multi-day running event held at Pathfinder Ranch in Mountain Center, California, from April 2 to 6, 2025. Celebrating its 13th year, BLU offers various race options, including 72-hour, 48-hour, 24-hour, 100-mile, 50-mile, and 50K races, all set on a scenic t..

The American River 50 Mile Endurance Run is one of the largest and most prestigious 50-mile races in the United States, attracting both seasoned runners and newcomers. Set against the stunning backdrop of Northern California, the race follows the scenic American River Parkway from Folsom to Auburn. ..