Trail Running calendar near Fairfield 2025-2026

The California Gold Rush Trail Run - Fall is a scenic trail running event held entirely within the historic Marshall Gold Discovery State Historic Park in Coloma, California. Set in the picturesque foothills along the south fork of the American River, the race commemorates the site of the 1848 gold..

Willow Hills XC is an annual 5K cross country race held at Willow Hill Reservoir Community Park near Folsom High School in Folsom, California. The course features two loops of rolling hills around a water reservoir, providing a challenging and scenic route for runners. Now in its 15th year, the even..

The California Fall Classic at Lake Sonoma, held in Healdsburg, CA, offers two challenging ultramarathon distances: 100K and 55K. Set amidst the scenic wine country during harvest season, the courses feature relentless single-track trails with stunning views of Lake Sonoma. The 100K serves as a qual..

The Diablo Summit Stomp is a trail running event held in Walnut Creek, California, featuring distances of 30K, half marathon, 10K, and 5K. The courses traverse dirt trails starting from Castle Rock Park and extend into Mount Diablo State Park, with the 30K reaching the summit of Mount Diablo. The ev..

The Heart of Cool Trail Run, held in Cool, California, offers a family-friendly trail running event featuring 5k, 10k, and half marathon distances. Set amidst the scenic Sierra Foothills, the course shares trails with renowned races like the Western States 100 and Way Too Cool 50k. Proceeds support..

The Quicksilver Trail Challenge, hosted by the Quicksilver Running Club in San Jose, California, is an annual trail running event held in late summer or early fall at Almaden Quicksilver County Park. It features a half marathon, a 10K race, and a free one-mile kids' fun run. The courses traverse sce..

The Haunted Hills 10K in Redwood City is a unique nighttime running event featuring a spooky, fun atmosphere perfect for adults and families. Participants run in teams of 1 to 5, equipped with headlamps or flashlights, as they navigate through wickedly decorated neighborhoods. The course includes 36..

The Oakland Hills Trail Run, held at Redwood Regional Park in Oakland, California, offers three challenging distances: 10K, half marathon, and 35K ultramarathon. Set in a serene redwood forest with towering 150-foot coast redwoods, the course features technical dirt trails and fire roads with signif..

The Napa Fall Wine Country Marathon is an annual trail running event held at Bothe-Napa Valley State Park in Saint Helena, California. Celebrating its 33rd year, the race offers marathon, half marathon, and 10K distances. The course features lush single-track trails with hills, streams, and rocky te..

The Almaden Hills Trail Run - Fall takes place in Almaden Quicksilver Park, located in the scenic Almaden Valley near San Jose, CA. The event offers a variety of distances including 50K, trail marathon, 30K, half marathon, 10K, 8-mile, and 5K races. The course features a challenging mix of terrain,..

The ZombieRunner Halloween is a festive running event held at Hellyer County Park in San Jose, California. Scheduled for November 1, 2025, it offers a variety of race distances including 5K, 10K, Half Marathon, Marathon, and age-specific 5K and 10K races, plus a free 50-yard Kid's Run for children s..

The Rio Del Lago 100 Mile Endurance Run is a premier ultramarathon held annually in the scenic Sierra Nevada Foothills near Folsom, California, about 40 minutes east of Sacramento. Starting at Beal's Point in the Folsom Lake State Recreation Area, the challenging 100-mile course features diverse ter..

The Oakland Tech 5km Fundraiser Race and 1 Mile Fun Run/Walk is set to take place at Joaquin Miller Park, supporting the Oakland Tech Cross Country and Track Team. This event features a scenic 5K trail run and a 1-mile fun run/walk, designed to cater to both competitive runners and leisurely partici..

The NorCal Backyard Ultra, held at Beals Point in Granite Bay, CA, is a challenging endurance running event featuring a 4.2-mile loop that participants must complete every hour on the hour. The main event, Last Person Standing, starts Friday evening and continues until only one runner remains, while..

The Mermaid Trail Run in Woodside, CA, is a scenic trail running event held at Huddart Park, featuring towering redwoods and lush forest trails. Scheduled for November 8, 2025, it offers multiple race distances including 3, 6, 9 miles, a half marathon, and a unique 6-hour challenge where participant..

The Lake Chabot Trail Run, held in Castro Valley, California, offers a variety of distances including 8K, Half Marathon, 30K, Marathon, 50K, and a free Kid's Run for children six and under. The course begins at the Lake Chabot Regional Park Marina and loops around the scenic Lake Chabot reservoir an..

The Mt. Tam Trail Run, held at Stinson Beach, California, offers challenging trail races of 10K, half marathon, 30K, and 50K distances. The course features a demanding climb up Mount Tamalpais with stunning views, followed by scenic trails through the Headlands, finishing back at the beach.The terra..

The Ripon Turkey Trail Run is a community-focused running event held in Ripon, California, at Mavis Stouffer Park along the Stanislaus River Trail. Scheduled for November 15, 2025, the race offers three distance options: 5K, 10K, and a half marathon (13.1 miles). Participants receive a custom techni..

The Falcon Crest Winter Trail Challenge is a scenic trail running event held in the foothills of El Dorado Hills, California, near Folsom Lake. The race offers multiple distances including 5K, 10K, 15K, half marathon, 30K, and a trail marathon, all featuring mostly single-track dirt and rocky trails..

The Golden Gate Trail Classic will take place in San Francisco from Saturday 22 November 2025 to Sunday 23 November 2025. You can run between 15 and 50 miles.