Trail Running calendar near San Jose 2025-2026

The Western Pacific event features a half marathon, 10K, and 5K, taking place in Fremont, California. Organized by Brazen Racing, this race utilizes the historic Western Pacific Trail, known for its flat and fast terrain, making it ideal for runners and walkers of all levels. The courses primarily c..

The Terrible, Horrible, No Good, Very Bad Day 50K is a unique trail running event set for 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. Participant..

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 pristine reservoirs, with an elevation gain/loss of approximately 400 feet. The event aims to raise funds and awareness..

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 lan..

The Golden Gate Headlands Marathon, Half Marathon, and 10K is a scenic running event taking place on April 5, 2025, in the Marin Headlands, California. Celebrating its 40th annual edition, the race offers participants breathtaking views of the Golden Gate Bridge, San Francisco Bay, and the Pacific O..

The Diablo Trails Challenge is a running event taking place on Mount Diablo, featuring various distances including a 50K, half marathon, 10K, and 5K. Scheduled for April 5, 2025, this challenge caters to runners of all experience levels, from beginners to seasoned ultra-runners. A portion of the ent..

The 2025 Romancing the Island Half Marathon and 10K is set to take place at Angel Island State Park in Belvedere Tiburon, California. This annual event, now in its 34th year, features a scenic loop trail that offers stunning views of the Golden Gate Bridge, San Francisco, and surrounding areas. Part..

The SPASM Lake Chabot Trail Run is a multi-distance running event taking place at Lake Chabot Regional Park in Castro Valley, California. Scheduled for April 12, 2025, the event features various race options including an 8K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for chil..

The Rodeo Beach Rumble is an exciting running event taking place in the stunning Golden Gate National Recreation Area, near San Francisco. Participants can choose between an 8K and a Half Marathon, both offering breathtaking views of the Bay Area and unique military landmarks along the routes. The e..

The Woodside Crossover is a trail running event taking place at Huddart County Park and Purisima Creek Redwoods Open Space Preserve in Woodside, California. Scheduled for April 12, 2025, the event features multiple race distances, including 10K, Half Marathon, 35K, and 50K, catering to runners of al..

The Sierra Azul Trail Challenge is an exciting running event taking place in the scenic Sierra Azul Open Space Preserve, near San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 20 Mile, Half Marathon, 7 Mile, and 5K. This challenging race offers a unique o..

The Badger Cove Half Marathon, along with 10K and 5K events, will take place on April 19, 2025, in Livermore, California, at Lake Del Valle Regional Park. This trail race invites participants of all levels, including walkers and hikers, to enjoy the scenic emerald hills. Runners will receive custom..

The Go Wild! Peninsula event in San Carlos offers participants a thrilling 4-hour trail and wilderness scramble amidst beautiful spring wildflowers and scenic views. Teams of 1 to 5 will navigate using a custom map to locate up to 24 checkpoints along the trails and natural landscapes of Redwood Cit..

The Horseshoe Lake Trail Run is an exciting running event taking place at the Skyline Ridge Open Space Preserve in La Honda, California. Scheduled for April 20, 2025, the event features multiple race distances, including a Half Marathon, 30K, 5-mile run, and a free Kid's Run for children aged 6 and..

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 Miwok 100K is a renowned trail ultramarathon celebrated for its stunning scenery and challenging course, featuring 11,800 feet of elevation gain. Set in the picturesque Stinson Beach area, participants enjoy breathtaking views of San Francisco, the Golden Gate Bridge, and the surrounding natural..

The Hacienda Hills Trail Run - Spring is an exciting trail running event set in the scenic Almaden Quicksilver County Park near San Jose, California. Scheduled for May 3, 2025, this event features nine different race distances, including a 50K, Trail Marathon, 30K, Half Marathon, 9 Mile, 10K, 5K, Mi..

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..