Trail Running calendar near Santa Rosa 2025-2026

We have found 61 Trailruns within 80 miles of Santa Rosa. See below where and when you can find the races.

The Ruth Anderson Memorial Endurance Run is an ultradistance race held annually in San Francisco, California, at scenic Lake Merced. The course features a mostly flat, USATF-certified 4.48-mile loop on paved paths and groomed dirt shoulders around the lake, with about 100 feet of elevation gain per..

Go Wild Marin 4 Hr is an adventurous trail and wilderness scramble held on the Tiburon Peninsula in Corte Madera, California. Participants compete individually or in teams of up to five, using a custom map to locate as many as 24 checkpoints scattered across trails and wild areas within a four-hour..

The Napa Lapa Trail Adventure, held at Skyline Wilderness Park in Napa, California, is a unique time-based trail running event where participants run as far as possible within set time limits of 3, 6, or 12 hours. The course features a challenging 4.16-mile loop with approximately 815 feet of elevat..

The John Lawson Tamalpa Challenge is a cross-country running event held annually at China Camp State Park in San Rafael, California. The 2025 edition features three races, each approximately 4.2 miles long, primarily on rolling single-track trails with a short stretch on asphalt. The event honors Jo..

The Lake Sonoma 100K and 55K, also known as the California Fall Classic, is a challenging ultramarathon held at Lake Sonoma, California, set amidst the scenic wine country during harvest season. The event features two distances—100 kilometers and 55 kilometers—on demanding courses that traverse mile..

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 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..

November 2025

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 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 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 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 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.

The Quad Dipsea will take place in Mill Valley on Saturday 29 November 2025.

UTMB Index

The Quarry Turkey Half Marathon is a family-friendly running event held at Quarry Lakes Regional Park in Fremont, California, on Thanksgiving weekend. The event features a mostly-flat, fast half marathon course along with 10K, 5K, and a free Little Turkeys sprint for children. Participants are encou..

December 2025

The ZombieRunner Quarry Lakes event, held at Quarry Lakes Regional Recreation Area in Fremont, CA, offers a variety of race distances including 5K, 10K, Half Marathon, 30K, Marathon, and age-specific 5K and 10K races, plus a free Kid's Run for children 6 and under. The courses are flat, fast, and sc..

The Peacock Gap Trail Run, hosted by Inside Trail Racing, takes place at China Camp State Park in San Rafael, California. Scheduled for December 6, 2025, the event offers three distances: 10K, half marathon, and 30K, with courses featuring scenic single-track trails, forested areas, and views of Mt...

The Hunter S. Thompson Fear & Loathing is a unique, no-fee urban ultra running event held annually in San Francisco, CA, since 1985. Participants can choose between a 50K or 50-mile single-loop course that starts and finishes at Twin Peaks, offering stunning city vistas.The route covers iconic touri..