Trail Running calendar near Fairfield 2025-2026

The Escape from Folsom is a trail running event held at Granite Beach, Folsom Lake State Recreation Area. It features two race distances: a 10-mile run and a 5K (3.1 miles). Both courses offer scenic trails adorned with wildflowers and include multiple aid stations providing water, electrolyte bever..

Bay Breeze in San Leandro is a scenic running event held at the San Leandro Marina Park along the San Francisco Bay. Scheduled for February 14, 2026, it offers a half marathon, 10K, and 5K distances, welcoming runners and walkers of all levels. The course is mostly flat, hugging the bayside trail an..

FOURmidable is a challenging trail running event held in Auburn, California, set in the scenic Sierra Nevada foothills. The race offers multiple distances including a 50K, 35.5K, half marathon, and 13K, catering to a range of endurance levels. Participants experience rugged terrain and picturesque n..

The Salmon Falls 50K Endurance Run is a challenging trail race set in the scenic foothills of Sacramento, California. This ultra-distance event starts at the Magnolia Ranch Trail Head near Coloma and features a stunning course that traverses the Cronan Ranch area, ultimately finishing at Folsom Lake..

The Way Too Cool 50K is a renowned ultramarathon held annually in Cool, California, featuring a challenging 50-kilometer trail run through scenic Northern California terrain. Celebrated for its rolling hills, creek crossings, and stunning views, the course offers a mix of natural beauty and physical..

Rattlesnake Dick is a trail running event held in Cool, California, offering 50K, 25K, and 10K distances. The courses feature significant elevation gains—4,700 feet for the 50K, 2,100 feet for the 25K, and 1,060 feet for the 10K—providing a challenging yet scenic experience. The race starts and fini..

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 Western Pacific Marathon event, held at Quarry Lakes Regional Recreation Area in Fremont, California, offers runners a choice of half marathon, 10K, and 5K distances. The course is mostly flat, following the historic Western Pacific Trail, which was originally used in the 1800s to transport grav..

The Bad Ass Backyard Ultra (B.A.B.U.) is a challenging endurance running event held at Dry Creek Parkway in Rio Linda, California, near Sacramento. Participants run a 4.16-mile loop every hour, starting on the hour, and must be ready to begin each new loop on time or face elimination. The race conti..

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 Diablo Trails Challenge is a trail running event held at 1700 Castle Rock Road, Walnut Creek, California. It offers multiple race distances including a 50K ultra, half marathon, 10K, and 5K, catering to runners of all experience levels from beginners to seasoned ultra-runners. The event supports..

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 Badger Cove Half Marathon, held at Del Valle Regional Park in Livermore, California, offers runners a choice of half marathon, 10K, and 5K distances. Scheduled for April 18, 2026, the event features scenic courses through the emerald hills of Lake Del Valle, with the 5K course being virtually hi..

The Outlands Endurance Race, held at Peninsula Campground in Pilot Hill, California, offers challenging trail running distances of 25K, 50K, and 50 miles. Set along the rugged, scenic edges of Folsom Lake, the courses feature a mix of runnable single track and double-wide trails with significant ele..

The Canyons Endurance Runs will take place in Auburn from Friday 24 April 2026 to Saturday 25 April 2026. You can run between 25 and 161 kilometers.

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 trail runs take place annually at Stinson Beach, California, starting from the Stinson Beach Parking Lot. This challenging event leads runners from sea level up into the dense, scenic trails of Muir Woods, following the famous Dipsea Trail to Steep..