Trail Running calendar near Modesto 2026-2027

This trail run along Folsom Lake features a scenic, mostly single-track course. Runners can choose from distances ranging from a 1 mile to a 50K. All finishers will receive a medal.

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.

Event Overview The 15th Annual Spirit of Benny 10K/5K Fun Run and Walk is a fundraiser supporting non-profit organizations that help seriously ill children and their families in El Dorado County, California. For this final edition, proceeds..

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.

Run through the Skyline Ridge Open Space Preserve on a scenic course featuring coastal views and gentle hills. All proceeds and matched entry fees support medical aid programs via The Hatuey Project.

Run a flat and fast course on the historic Western Pacific Trail in Fremont. Choose from a half marathon, 10K, or 5K starting at Quarry Lakes. The event is open to runners and walkers of all levels.

Run the single-track trails alongside Folsom Lake in El Dorado Hills. The event offers four distances from a 5K to a half marathon, with technical sections and scenic views. All finishers receive a medal.

The Diablo Trails Challenge offers four trail distances on Mount Diablo. A portion of entry fees supports the conservation work of Save Mount Diablo. The half marathon is part of the challenging Brazen Ultra Half Series.

The American River Endurance Runs offer three distances: 50, 25, and 10 miles, all finishing in Auburn. The 50-mile race is one of the largest of its kind in the US. Runners are supported with aid stations and celebrated at the finish with..

Experience the scenic Merced River Canyon on hardpacked trails with two distinct options. Choose between a fast flat course along an old railroad grade or a demanding switchback hill climb with significant elevation gain.

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.

Run the scenic trails at Lake Del Valle Regional Park in Livermore. The Badger Cove event offers a Half Marathon, 10K, and 5K on April 18, 2026, with walkers and hikers welcome. The half marathon is part of a challenging trail series.

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.

The No Foolin' Foot Race will take place in San Carlos on Saturday 18 April 2026. You can run between 5 and 15 kilometers.

Experience the majestic redwoods of the San Francisco Peninsula with professional chip timed races spanning 10K to 50K. Navigate beautiful single track trails and steep canyons in this scenic trail running event.

A community trail event in Mariposa on April 19, 2026, with 5K and 12K courses starting at the historic courthouse. Aid stations and Search and Rescue support are provided, and children under 18 may participate for free.

Join the SJVDHA for their annual Pacing for Prevention 5K, supporting oral cancer research. Walk or run a paved, scenic trail that welcomes strollers and dogs. Connect with health professionals and participate in wellness activities.

Trail races held inside Marshall Gold Discovery State Historic Park near Coloma offer distances from a kids run to a half marathon. Courses mix singletrack, switchbacks and paved sections, with marked routes, aid stations and on-course mars..

Experience a rugged trail race through the Sierra Nevada foothills featuring technical single tracks and fire roads. Choose between three distances and take on the steep ascent of El Guapo before celebrating at the finish line fiesta.