Trail Running calendar near Rio Linda 2026-2027

The Big Alta is a scenic trail running weekend in Marin County, California. It offers three challenging distances: a 100K point to point, a 50K loop, and a 28K loop, all summiting high points for vast Bay Area views.

Choose from three trail distances—50K, 25K, or 10K—starting from the Cool Staging Area in California. Each course features significant elevation change and a generous 10-hour cutoff for the longer races. All participants get a race shirt, a..

Run through the scenic single track trails of Bothe Napa Valley State Park. Choose from marathon, half marathon, or 10K distances on this popular course. Participation is limited to 300 runners for the annual trail event.

Experience the beauty of Redwood Regional Park in Oakland with distances ranging from 5 miles to a 50K ultramarathon. Run through towering redwood groves and along scenic ridges in this spring trail event.

Join the final edition of this historic Placerville fundraiser featuring 5K and 10K distances on the El Dorado Trail to support youth and family services.

Experience the trails of Clayton at the Diablo Summit Challenge. Run a 22.5 km course starting at Mitchell Canyon Road and support local community initiatives through this outdoor adventure.

Join the 11th annual Mighty Dog Trail Runs at Folsom Lake featuring 10K and 5K distances. Runners and walkers can compete with their dogs for finisher medals and special canine bandanas on scenic granite trails.

The Lag Bon 10K is a trail race in Fairfax, CA, on March 22, 2026. This run supports clean water access and features a scenic, technical course around Marin's reservoirs.

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..

Run on the historic Western States trail at the Knickerbocker Canyon Trail Run. Choose from four distances, from a 5K to a challenging 35K, all starting from American River Overlook Park. The course features river views, the iconic No Hands..

Experience the scenic foothills of El Dorado Hills on single track trails overlooking Folsom Lake. Choose from four race distances ranging from a 5K to a Half Marathon through rolling hills and oak groves.

Experience an obstacle course weekend at Woodward Reservoir Regional Park near San Jose. Choose from distances ranging from a 5k Sprint to a 50k Ultra on a flat course designed for personal performance.

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 a historic trail journey from Folsom to Auburn along the beautiful American River Parkway with race options coverging 10, 25, and 50 miles.

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 a rugged trail running weekend in California's wine country on April 11, 2026. The event offers a Western States qualifying 100K, a challenging 50K, and a women's Trail Sisters Half Marathon. All races are cupless and feature sce..

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..