Trail Running calendar near Geyserville 2026-2027

The Sludge Trudge 5K is a paved run/walk at North Natomas Regional Park. It's a sanctioned event with professional timing and awards for top finishers. The event is hosted for a specific community group and their guests.

Experience a scenic trail run around Angel Island with panoramic views of the Golden Gate Bridge and San Francisco. This event features a hilly loop course for both Half Marathon and 10K distances with ferry transport included.

Experience California wine country at this premier trail festival featuring a Western States Qualifier 100K, a scenic 50K, and a women-only half marathon around the beautiful shoreline of Lake Sonoma.

A mountain trail event in Calistoga offering 10K to 50K courses that mix fire road and technical single-track, with multiple aid stations, on-mountain logistics, and UTMB Index status for several distances.

Experience a scenic trail run along the San Francisco coast with views of the Golden Gate and Pacific Ocean. This five kilometer event awards ribbons to all finishers and top category performers.

A coastal trail race in Mendocino, CA at the 50K distance featuring river, redwood and ocean sections with a finish on the bluffs above Mendocino Village; registration closes March 31.

Run through the beautiful trails of Trione Annadel State Park in Santa Rosa. This eco friendly event offers a half marathon, 10K, and 5K to support local park conservation and stewardship.

Join a free, inclusive community trail run on the beautiful Marin Headlands trails. Choose from short, medium, or long unmarked courses and enjoy a post-run meal with giveaways from key running brands. The event fosters connection before th..

The Presidio Community YMCA hosts the 14th annual Presidio Trail Run on April 19, 2026, with 10K, 5K and 1.5 mile courses through the Presidio. Entry fees support YMCA community programs and a signed waiver is required.

Run along the scenic coastal ridge of Mt Tamalpais State Park in this 38th annual event. Choose between a half marathon or 10K featuring single track trails and views of the Pacific Ocean.

Experience an iconic trail ultramarathon through the redwoods and coastal cliffs of the Marin Headlands. This challenging 62 mile course features 11,000 feet of gain and serves as a major race qualifier.

Run through the historic Beauty Ranch at Jack London State Historic Park. This inaugural trail event features a half marathon and five mile course amongst the vineyards and forested slopes of Sonoma Mountain.

A trail run through the forested trails of Pacific Union College offering 26k, 10k, and a 1 Mile Kids Run for ages 7 to 12. The event is cupless, parking is free first come first served, and proceeds support PUC Athletics.

Experience the 36th annual trail run through Muir Woods and the legendary Dipsea trail. Choose between a marathon, half marathon, or 7 mile route starting from the scenic Stinson Beach.

Run or walk through conifer forests and along coastal bluffs in Point Arena. This sustainable 5K trail event supports local environmental education and youth stewardship on the Mendocino Coast.

Experience the scenery of Tilden Regional Park at the Grizzly Peak Trail Run. Choose from various distances including a 50K and marathon starting from the shores of Lake Anza in Berkeley.

A timed half marathon on 9 May 2026 from Quintessa Winery to Yountville in Napa Valley. The finish line Wine Village features live music, Domaine Chandon welcome bubbles and complimentary tastings from multiple wineries.

Trail races at Skyline Wilderness Park near Napa offering 50K, 30K, 21K and 10K on routes with Rim Rock climbs and wide valley views. Aid stations are touchless and the event is cupless so runners must bring their own cup or bottle.

The inaugural Rim Rock 50 Mile Trail Challenge explores Napa's wild trails. Runners will tackle a two-loop course through Skyline Park and the new Suscol Headwaters. This cupless event offers a 50-mile solo or relay option with a 13-hour cu..

Experience 360 degree views of the Bay Area at Wildcat 2026 in El Sobrante. This scenic event features a Half Marathon, 10K, and 5K as well as a remote participation option.