Trail Running calendar near Walnut Creek 2025-2026

The Bay 2 Bankers 10K and 5K in San Francisco is an annual race celebrating the city's vibrant neighborhoods and classic vibes. Participants navigate a course starting near the Ferry Building, using a custom map to find checkpoints and answer multiple-choice questions. The event fosters community en..

The Rancho Hills Trail Run - Summer is a challenging trail running event held in the scenic foothills of the South Bay Area, specifically within the Rancho Cañada del Oro Open Space Preserve in Morgan Hill, California. The race features a variety of distances, including 50K, trail marathon, 30K, hal..

The Dirty Dozen Run is an endurance trail running event held at Point Pinole Regional Shoreline in Richmond, California. Scheduled for July 12, 2025, it features 12-hour, 6-hour, and 3-hour races on a scenic 3.37-mile loop composed mostly of dirt fire trails. The course offers expansive shoreline vi..

The Muir Woods Trail Run, held in Stinson Beach, CA, offers 10K, half marathon, and 30K distances through scenic Mt. Tamalpais State Park and Muir Woods National Monument. The challenging course features steep climbs, including a 2,000-foot ascent up Willow Camp Hill, ridge-line views of Stinson Bea..

The San Lorenzo River Trail Run is an exciting running event set in Santa Cruz, California, featuring 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. Participants will experience a scenic course that winds thr..

The Calero Hills Trail Fest is a trail running event held at Calero County Park in San Jose, California. Participants can choose from various distances, including marathon, 30K, half marathon, 10-mile, 10K, and 5K courses. The race features challenging terrain with single track trails, hills, and di..

The Folsom 100 is an exhilarating 100-mile ultramarathon that takes place around Folsom Lake, California. Scheduled for August 1, 2025, this challenging race features a point-to-point course with a single out-and-back section. Participants have 34 hours to complete the loop, which includes stunning..

The Rodeo Valley Trail Run, held in the Marin Headlands near Sausalito, CA, offers a scenic and challenging trail running experience with distances of 8K, Half Marathon, 30K, and 50K. Starting near historic Fort Cronkhite and Rodeo Beach, the course features steep climbs and descents through coastal..

The Skyline 50K Endurance Run is one of California's oldest and most celebrated 50K races, taking place annually in August at Lake Chabot Marina in Castro Valley. This event is designed for both novice and experienced ultrarunners, featuring a scenic course that loops through the East Bay Regional P..

The Mount Madonna Challenge, held in Gilroy, California, is a historic trail running event featuring a half marathon, 10K, and 5K races. Known for its challenging elevation gains—2,828 feet for the half marathon, 1,532 feet for the 10K, and 843 feet for the 5K—the course offers a rigorous test of en..

Bear Creek is a trail running event held in Lafayette, California, featuring a half marathon, 10K, and 5K distances. The race takes place on August 9, 2025, at Bear Creek Road within Briones Regional Park. Unlike flat courses, Bear Creek offers a challenging experience with many hills, making it ide..

The Redwood (Summer) Trail Run is an exciting running event taking place in Oakland, California, featuring a variety of race distances including a 5-mile run, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. The course winds through the scenic Redwood..

The Tamalpa Headlands 50K is a challenging ultramarathon held annually in Marin County, California, starting and finishing at Santos Meadow near Muir Woods. Covering a 50-kilometer single-loop course, the race features approximately 6,500 feet of elevation gain across iconic trails such as Coastal,..

The Almaden Hills Trail Run - Summer is a challenging trail running event held at Almaden Quicksilver Park in the scenic Almaden Valley, San Jose, California. The course features a mix of 60% dirt roads and 40% single-track trails, with significant hills offering great views and beautiful countrysid..

The Envirosports Angel Island Half Marathon & 10K is an annual race held at Angel Island State Park near Tiburon, California. The event features a scenic, hilly loop trail that circumnavigates Angel Island, offering stunning panoramic views of the Golden Gate Bridge, San Francisco, Alcatraz Island,..

The Double Dipsea is a challenging 13.7-mile trail run that takes place annually, starting at Stinson Beach, California. First held in 1970, this race is known for its unique handicapped start format, where slower runners begin first, creating a dynamic environment of constant passing on narrow trai..

The Santa Cruz Trail Run, hosted by Inside Trail Racing, takes place at Henry Cowell Redwoods State Park in Felton, California. This scenic event features three distances: 10K, Half Marathon (13.5 miles), and 30K (18.2 miles), with challenging elevation gains up to 3,250 feet. Runners traverse twist..

Run-de-Vous is a community-focused running event held at Harvey Bear Ranch Park in San Martin, California, on August 29, 2025. The race features multiple distances, including 100 miles, 100K, 50 miles, marathon, 50K, and a 4-person 50M relay. The course is a fast, manageable 2-mile loop set against..

The SPASM Crystal Springs Trail Run is an exciting running event taking place in Huddart Park, Woodside, CA. Scheduled for August 31, 2025, it features multiple race distances including an 8K, Half Marathon, 35K, Marathon, and 50K, along with a free Kid's Run for children aged 6 and under. Participa..

The Stevens Creek Striders Reservoir Run, held in Cupertino, CA, offers a scenic trail running experience with distances of a Half Marathon (13.2 miles), 11K, and a 2.5-mile Lollipop Loop charity run/walk. The course features shaded single-track trails and open vistas, including challenging steep as..