Trail Running calendar near Clayton 2025-2026

The Mt. Tam Wild Boar Half Marathon and 10K is an annual running event held at Mt. Tamalpais State Park in Mill Valley, California.Celebrating its 37th year in 2025, the race features scenic coastal ridge trails with stunning views of the Pacific Ocean and surrounding landscapes. Participants can ch..

The No Foolin' Foot Race, organized by the Parks and Recreation Foundation of San Carlos, invites participants to explore the scenic trails of San Carlos in its third annual event. Runners can choose between a challenging 5k and 10k course, featuring significant elevation gains, or a 1-mile course f..

The Brown’s Ravine Half & Full Marathon is a scenic trail race held near Folsom Lake in El Dorado Hills, California. The event features a mostly single-track trail with some dirt roads, offering runners beautiful views of Folsom Lake, surrounding foothills, oak trees, and the Sierra Mountains. The h..

The 2025 Animal Run features a 10k race, along with a 5k, Canicross, and a 2-mile walk, all taking place at 900 Dornan Drive, Richmond, CA. This event serves as a fundraiser for Rancho Compasión, promoting a community of athletes dedicated to animal kindness and environmental awareness. Participants..

The Miwok 100K is a renowned trail ultramarathon celebrated for its stunning scenery, featuring views of San Francisco, the Golden Gate Bridge, and the majestic redwoods. The course, which includes 11,800 feet of elevation gain, combines single-track trails and dirt roads, making it both challenging..

The Hacienda Hills Trail Run - Spring is a trail running event held near San Jose, California, at Almaden Quicksilver County Park. It features nine race distances, including a Kids Run, 1 Mile, 5K, 10K, 9-Mile, Half Marathon, 30K, Trail Marathon, and 50K, offering options for all levels of runners...

The Folsom Lake Trail Run, organized by Inside Trail Racing, offers participants a scenic trail experience along the southeastern side of Folsom Lake in California. The event features multiple race distances, including 10K, half marathon, 35K, and 50K, with courses winding through well-preserved, mo..

The Angwin to Angwish Trail Run, set in the scenic Napa Valley, features a variety of challenging courses for runners of all ages. Scheduled for May 4, 2025, participants can choose from three distances: a 1 Mile Kids Run, a 10K, and a 26K. This cupless event encourages sustainability by requiring r..

The Grizzly Peak Trail Run is an exciting running event taking place at Lake Anza in Tilden Regional Park, Berkeley, CA. Scheduled for May 10, 2025, it features multiple race distances including a 10K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under...

Nitro Trail 2025 is an exciting running event taking place at Point Pinole Regional Shoreline Park in San Pablo, California. Participants can choose from three race distances: a half marathon, 10K, and 5K, making it suitable for runners of all levels. The event celebrates the park's transformation f..

The Quicksilver Endurance Runs is an annual trail running event held in San Jose, California, featuring 50K and 100K races on scenic, challenging single-track trails and fire roads through oak forests, meadows, and ridges with panoramic views of the Santa Clara Valley and Santa Cruz Mountains. The 1..

The Muir Woods Marathon is a challenging trail running event held in Stinson Beach, California, part of the Enviro Sports series. Participants can choose from a marathon, half marathon, or a 7-mile race, all set amidst the scenic and rugged trails of Muir Woods. The course features steep climbs, nat..

The 13 Mile Trail Race Top Down is a scenic trail running event held in San Jose, California, featuring a half marathon course through Almaden Quicksilver Park and Sierra Azul Open Space Preserve. Participants are transported from Almaden Quicksilver Park to the starting point at Mt. Umunhum, where..

Trailquake is an exciting running event taking place in Saratoga, California, featuring a half marathon, 10K, and 5K races. Set against the stunning backdrop of redwoods and pines, participants can enjoy beautiful trails while engaging in a challenging yet rewarding experience. The event welcomes ru..

The Napa Wilderness Trail Runs is a trail running event held at Skyline Wilderness Park in Napa, California. It offers a variety of race distances, including 10K, half marathon, 30K, 50K, and a 40-mile ultra marathon, catering to runners of all levels. The courses feature scenic views of Napa Valley..

The Run for Amma is a charity running event held at Skyline Ridge Open Space Preserve in Los Gatos, California, on May 17, 2025. The event features three race distances: 50K, 30K, and 10K, with start times at 7:30 AM and 9:00 AM. All proceeds from registration are donated to the UCSF Julia Carnevale..

The Placer Trail Running Festival, held in Granite Bay, California, offers a variety of trail races for all levels, including 5K, 10K, and 25K distances, along with a Canicross event. The festival takes place on May 17, 2025, and features scenic courses through pristine trails near Folsom Lake. Part..

The Pacifica Foothills Trail Run, taking place at San Pedro Valley Park in Pacifica, CA, offers participants a choice of three distances: 10K, Half Marathon, and 30K. Set against the stunning backdrop of the Santa Cruz Mountains, the event features scenic dirt trails that wind through coastal foothi..

The Calero Trail Run - Spring is a trail running event held at Calero County Park in San Jose, California, featuring multiple race distances including a Kids Run, 5K, 10K, 15K, half marathon, 25K, marathon, and 50K. The course offers challenging single tracks, hills, dirt paths, and scenic vistas, m..

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..