Trail Running calendar near Walnut Creek 2025-2026

The Lost Trail Half Marathon and 5K, organized by TBF Racing, takes place at Granite Beach, Folsom Lake SRA. This scenic event features well-marked courses with beautiful lake views and wildflowers, supported by multiple aid stations. Participants can enjoy custom finisher medals and soft-cotton rac..

The Montara Mountain Trail Run is an exciting running event taking place in Pacifica, California, featuring a variety of race distances including a 10K, Half Marathon, 20-mile, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. Set against the stunning backdrop of Montara..

The Sanborn Trail Challenge is an exciting running event taking place in Sanborn County Park, Saratoga, CA. This challenging race features a variety of distances, including a Half Marathon, 8 Mile, 4 Mile, and a Kids Run, all set against a backdrop of lush, mountainous terrain. The course is predomi..

The Race to the Top of Mt. Umunhum Vert Trail Challenge is a half marathon event taking place in San Jose, California, within the scenic Almaden Quicksilver Park and Sierra Azul Open Space Preserve. Participants will experience a challenging point-to-point course, with a six-hour time limit to compl..

The Marin Ultra Challenge is a premier long-distance trail race held in Marin County, featuring a 50-mile and a 50K course. Scheduled for March 8, 2025, the event showcases some of the most scenic trails in the region, including the Marin Headlands, Mt. Tamalpais, and Muir Woods.Participants can exp..

Zoom Angel Island is a running event taking place on Angel Island, California, featuring multiple race distances: 5 miles, 10 miles, and 15 miles, along with a free Kid's Run for children aged 6 and younger. The event offers scenic trails with stunning views of Marin County and San Francisco. Partic..

The Rattlesnake Ramble is a running event featuring a 5K, 10K, and Half Marathon, available in both live and virtual formats. Scheduled for March 14-17, 2025, the event takes place at China Camp State Park in Santa Venetia, California. Participants can choose from various trail courses, each offerin..

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

The Bad Ass Backyard Ultra, held at Dry Creek Parkway in Rio Linda, California, is a unique running event where participants complete 4.16-mile loops within one hour. Runners must be ready to start each new loop on the hour, and those who fail to do so are eliminated. Originally created in 2023 as a..

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 Diablo Nomadic Challenge 22.5K will take place in Clayton on Saturday 22 March 2025. You can run 22 kilometers.

The Horseshoe Lake Half Marathon is a scenic running event taking place in La Honda, California, featuring a 13-mile course that offers stunning views of both the Pacific Ocean and San Francisco Bay. The route combines single-track trails and fireroads, with a total ascent of 2230 feet, making it su..

The Western Pacific 2025 is a running event featuring a Half Marathon, 10K, and 5K, taking place at the Quarry Lakes Regional Recreation Area in Fremont, California. This scenic course, historically used for transporting gravel in the 1800s, offers a mostly flat terrain ideal for runners of all leve..

The Folsom Lake Falcon Crest Trail Run, scheduled for March 29, 2025, takes place 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 Terrible, Horrible, No Good, Very Bad Day 50K is a unique trail running event taking place on March 29, 2025, in Los Gatos, California. This non-supported, fatass run features challenging options, including a 50K with 10,900 feet of elevation gain, a 30K fun run, and a 10-mile Puppymeat run. Par..

The Lag Bon 10K is a trail running event taking place in Fairfax, California, aimed at raising awareness and funds for the global water crisis through the Safe Water Now program by Evidence Action. Set against the scenic backdrop of Marin County's reservoirs, the course features a mix of technical t..

The Santa Teresa King Richard Annual Trail Run is a cherished event held at Santa Teresa County Park in San Jose, CA, designed to honor the legacy of Richard Limb. Participants can choose from various distances, including a Half Marathon, 10 Mile, 10K, and 5K, all set against the park's stunning nat..