Trail Running Calendar California 2025-2026

The Pasadena 50K Relay & 50K Solo event is set to take place on May 25, 2025, at Hahamongna Watershed Park. This exciting race features a 50K Relay, where teams of up to five runners can compete against each other, making it a great opportunity for friends, family, or running club members to join fo..

The Forever Brave Half Marathon in Valencia is a vibrant running event scheduled for May 25, 2025. Participants can choose from various distances, including a 5k, 10k, 15k, and a half marathon, all set on an open course designed for a fun and relaxed experience. The race features out-and-back loops..

The Sonoma Coast Trail Runs, organized by SkyBreaker Racing, is an exciting running event set in the stunning landscapes of Sonoma Coast State Park, California. Participants can choose from various race distances, including a 50K, Trail Marathon, 30K, and Half Marathon. The courses feature beautiful..

The Calero Trail Run - Spring is an exciting trail running event held at Calero County Park in San Jose, CA. Participants can choose from various distances, including a 50K, marathon, 25K, half marathon, 15K, 10K, 5K, and a kids run. The course features scenic single tracks, hills, and dirt paths, m..

The Pacifico Ultra is an exciting running event set in the stunning Angeles National Forest, taking place on May 31, 2025. Participants can choose between two challenging courses: a 50k Ultra featuring 5,626 feet of elevation gain and a 20k Trail with 2,333 feet of gain. Both routes offer breathtaki..

The Wildcat Half Marathon, organized by Brazen Racing, is set to take place on May 31, 2025, in El Sobrante, California. This event features a Half Marathon, 10K, and 5K, all set within the scenic Wildcat Canyon Regional Park, offering breathtaking views of the Bay Area. The race is designed for all..

The The Hills Are Alive 10K will take place in Rolling Hills Estates on Saturday 31 May 2025. You can run between 5 and 10 kilometers.

The Toro Park Trail Run is an exciting running event set in the picturesque Toro Park, located in Salinas, CA. Participants can choose from three race distances: a Full Marathon, a Half Marathon, and a 10K, all featuring the stunning scenery of the Bay Area, including rolling golden hills and smooth..

The 2025 Lake Chabot Trail Challenge features a Half Marathon and a 5K run, taking place in Castro Valley, California. This annual event, now in its 41st year, is popular among trail runners and offers scenic views of Lake Chabot, Mt. Diablo, and the San Francisco Bay.The Half Marathon course is a h..

The Cinderella Trail Run is an exciting running event taking place in Oakland, California, featuring a variety of race distances including a Half Marathon, Marathon, 8K, 30K, 50K, and a free Kid's Run for children aged 6 and under. Set in the scenic Joaquin Miller and Redwood Regional parks, partici..

Run the Rim is a trail running event taking place on the Arnold Rim Trail in Stanislaus Forest, California. Organized in collaboration with local associations and communities, the event features multiple race distances: a 22-mile point-to-point run, a half marathon, and a 10K. The courses offer scen..

The San Diego 100 is a challenging 100-mile ultramarathon set in the scenic mountains of San Diego County, California. Scheduled for June 6, 2025, the race features a loop course primarily on single-track trails, including sections of the Pacific Crest Trail and various state parks. Participants fac..

The Mt Umunhum Ultras is an exciting trail running event set in the scenic Santa Clara Valley and Sierra Azul Open Space Preserve. Participants can choose from various distances, including a challenging 52-mile ultra, a 50K, a trail marathon, and shorter races like the 30K, half marathon, 9-mile, 10..

The Shadow of the Giants 50k & 20k Run is a celebrated annual event taking place in the scenic Sierra National Forest. This year marks the 35th edition of the race, which offers participants the choice between a 50k and a 20k run. The event emphasizes a community spirit, featuring pre-race accommoda..

The Mississippi Bar Trail Run is an annual event taking place in Fair Oaks, CA, featuring both 5K and 10K trail runs. Scheduled for June 7, 2025, the race offers participants a scenic route through wetlands and oak woodlands along the north shore of Lake Natoma. This year, a 10K option has been adde..

The Grasshopper Peak Redwoods Run, taking place in Humboldt Redwoods State Park, offers participants a choice between a 30K and a 10.5-mile race. Celebrating its 10th year, the event showcases scenic trails that wind through the park, culminating in a finish among towering old-growth redwoods in Bul..

The Malibu Canyon Trail Races, organized by Keira Henninger, will take place on June 7, 2025, in the scenic coastal Santa Monica Mountains of Malibu, California. This challenging event features multiple race distances, including 100K, 50 miles, 50K, and 30K, allowing participants to experience the b..

The China Camp Trail Run, taking place at China Camp State Park in San Rafael, CA, features three race distances: 5K, 10K, and Half Marathon. Participants will enjoy scenic views of Mt. Tam, San Pablo Bay, and San Francisco Bay while navigating through twisting single-track trails and lush forests.T..

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 Griffith Park Trail Marathon Relay & 8K is a celebrated running event in Los Angeles, recognized as one of Runner’s World magazine’s "10 Best Races You’ve Never Heard Of." This exciting race, set in the scenic Griffith Park, offers participants the chance to either run solo or form teams for a r..