Trail Running calendar near Yountville 2026-2027

The Bad Ass Backyard Ultra tests endurance with a relentless hourly loop format in Rio Linda. Complete a 4.16-mile loop every hour to stay in the race. As an official Backyard Ultra, it offers a path to national and world championship quali..

Experience a piece of railroad history at this event in Fremont's Quarry Lakes Regional Recreation Area. Run a flat course on the historic Western Pacific Trail with distances including a half marathon, 10K, and 5K.

Knickerbocker Canyon is a trail event in Auburn, California offering 5K, 10K, half marathon and 35K routes on the Western States trail. Courses feature technical single track and fire roads, marked routes, timed results and cupless aid stat..

Trail races from 5K to half marathon run on single track around Folsom Lake from the Falcon Crest parking area. Courses are marked with colored ribbons and feature dirt and rocky surfaces with rolling hills and some technical sections.

Run along the scenic Pacifica coastline in the Mori Point 7K. This event features a flat course through the Mori Point National Recreation Area using a mix of trails and paved paths.

Experience a scenic trail run through the Marin Headlands with panoramic views of the Golden Gate Bridge and Pacific Ocean. Choose between 10K, half marathon, and marathon distances on a course featuring wildflower lined trails.

Experience the scenic beauty of Mount Diablo with trail races ranging from 5K to 50K. Support local land preservation while enjoying a professional event featuring a post race BBQ in Walnut Creek.

Experience one of the largest 50 mile endurance runs in the United States. Choose between 10, 25, or 50 mile distances through scenic Northern California finishing with celebratory festivities in Auburn.

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.

Experience a scenic trail run around Lake Chabot and the surrounding hills of Castro Valley. With distances from a 50 yard dash to a 50K ultramarathon there is an event for everyone at this regional park.

A women focused 10K in Auburn on April 11, 2026 featuring scenic trail loops, finisher shirts, age group awards and a raffle with four winners earning a trip to a women only running camp in Spain.

Explore the rolling hills of Cronan Ranch at the Magnolia Magic River Trail Run. This event offers a range of distances on dirt and rock trails, from a 5K to a 50K ultra. All participants receive a medal and access to aid stations along the..

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.

Explore remote trails along Folsom Lake with the Outlands Endurance Races. Choose from 25K, 50K, or 50-mile distances on scenic singletrack. The event starts and finishes at Peninsula Campground in Pilot Hill.

Experience the hills of Del Valle Regional Park in Livermore with a flat 5K or hilly 10K and half marathon. All participants receive a custom medal and t-shirt with professional chip timing included for all distances.

Experience the coastal beauty of the Bay Area Ridge Trail with distances ranging from a 50 yard dash to a 50K ultramarathon. Runners enjoy expansive views of the Pacific Ocean and the Santa Cruz Mountains.

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.

Experience a technical trail race through the scenic parks of San Carlos. Choose from four distances including a 15K long course and a dedicated kids run to support local trail maintenance.