Trail Running calendar near Lake Sonoma 2025-2026

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

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..

The Hark the Herald Half Marathon & 10K is an annual running event held at Angel Island State Park near Belvedere Tiburon, California. Celebrating its 37th year in 2025, the race features a scenic, hilly loop trail around Angel Island with stunning views of the Golden Gate Bridge, San Francisco, Alc..

The Napa Valley Trail Marathon, Half Marathon, and 10K is an annual trail running event held at Bothe-Napa Valley State Park in Saint Helena, California. Now in its 34th year, the race features challenging courses with hills, streams, and rocky terrain along lush single-track trails. Participants ca..

The Golden Gate Headlands Marathon, Half Marathon, and 10K is an annual trail running event held in the scenic Marin Headlands near Mill Valley, California. Participants start and finish at the Historic Gunnery Range in Rodeo Valley, running through a course that combines single-track hiking trails..

The Romancing the Island Half Marathon & 10K is an annual running event held at Angel Island State Park near Belvedere Tiburon, California. Participants enjoy a scenic, hilly loop trail that circumnavigates Angel Island, offering stunning panoramic views of the Golden Gate Bridge, San Francisco, Alc..

The Lake Sonoma 50 is a premier trail running event held in Healdsburg, California, featuring a 50-mile ultramarathon, a marathon, and the Trail Sisters Half Marathon. Set against the scenic backdrop of Lake Sonoma, the races offer challenging courses through beautiful natural terrain. The event fos..

The Napa Valley Endurance Run is a challenging trail running event held in Calistoga, California, starting and finishing at the Calistoga Fairgrounds. It offers four race distances: 50k, 35k, half-marathon, and 10k, all traversing scenic single-track and fire road trails through Robert Louis Stevens..

The Mt. Tam Wild Boar Half Marathon & 10K is an annual trail running event held at Mt. Tamalpais State Park in Mill Valley, California.Celebrating its 38th year, the race features a scenic coastal ridge course combining paved roads and single-track dirt trails with stunning views of the Pacific Ocea..

The Miwok 100K is a renowned trail ultramarathon held near Stinson Beach, California, just under an hour from San Francisco. The challenging 100-kilometer course features 11,800 feet of elevation gain across single-track trails, dirt roads, and about a mile of paved road. Runners enjoy stunning view..

The Muir Woods Marathon, Half Marathon, and 7 Mile race take place annually at Stinson Beach, California, offering a challenging trail running experience through the scenic Muir Woods. Participants start at sea level before ascending into dense redwood and oak forests along the historic Dipsea Trail..

The Waves & Whales 5K Trail Run is an annual event held on the Mendocino Coast in Point Arena, California. The scenic course starts behind City Hall in a conifer forest near Highway 1, follows coastal bluffs along the Point Arena-Stornetta Unit of the California Coastal National Monument, and loops..

The Rim Rock 50 Mile Trail Challenge is an inaugural ultramarathon held in Napa Valley, California, centered at Skyline Wilderness Park. The race features a challenging 50-mile solo course or a 50-mile relay for teams of two, traversing rugged trails through Skyline Wilderness Park, Napa Open Space..

The Napa Wilderness Trail Runs, held at Skyline Wilderness Park in Napa, California, offer a variety of trail running distances including 10K, 21K (half marathon), 30K, and a challenging 50K ultra marathon. The courses feature scenic routes with steep climbs, notably the Rim Rock Trail, providing st..

Sonoma Coast Trail Runs, hosted by SkyBreaker Racing, take place in Sonoma Coast State Park near Duncans Mills, California. The event offers multiple distances: 50K, Trail Marathon, 30K, and Half Marathon, all featuring challenging elevation gains ranging from 2,800 to 7,000 feet. Runners traverse s..