Mammoth Bar Trail Runs

The Ruck a Chuck 50K is an exhilarating trail running event set in the stunning Sierra Nevada foothills of Foresthill, California. Participants will navigate a challenging out-and-back course that showcases the breathtaking beauty of the region, including sections of the historic Western States Trai..

The Folsom Lake Southside Trail Run is an exciting trail running event set to take place in Folsom, California, featuring a scenic course that is 95% single track and 5% dirt road. Participants will enjoy beautiful views of Folsom Lake, oak trees, and the Sierra Mountains while navigating gentle rol..

The Bad Ass Backyard Ultra, held at Dry Creek Parkway in Rio Linda, California, is a unique running event where participants complete 4.16-mile loops within one hour. Runners must be ready to start each new loop on the hour, and those who fail to do so are eliminated. Originally created in 2023 as a..

The Knickerbocker Canyon Trail Run, organized by Inside Trail Racing, offers a challenging and scenic experience for runners of all levels on March 22, 2025, at American River Overlook Park in Auburn, CA. Participants can choose from four distances: 5K, 10K, Half Marathon, and 35K, all featuring var..

The Rattlesnake Dick event features a thrilling series of races including a 50K, 25K, and 10K, set in Cool, California. Participants can enjoy a generous 10-hour cut-off for the longer distances, with all finishers receiving a stylish event shirt and a high-quality finisher's medal. The race is desi..

The Folsom Lake Falcon Crest Trail Run is an exciting running event set in the scenic foothills of El Dorado Hills, California. Participants can choose from various distances, including a 5K, 10K, 8-mile, and half marathon, all featuring beautiful single-track trails alongside Folsom Lake. The cours..