Mammoth Bar Trail Runs
Auburn, United States • 6 Sep 2026
Mammoth Bar Trail Runs
Mammoth Bar Trail Runs take place at the Mammoth Bar OHV Area in Auburn State Recreation Area, on Old Foresthill Rd in Auburn, California. The event day is September 6, 2026.
Distances offered:
- 13.1 Miles Half Marathon, approximate elevation gain 4,300 ft.
- 6.2 Miles 10K, approximate elevation gain 1,900 ft.
The Half Marathon has aid stations at Castle Rock Aid (mile 2), F.D.L. Aid (mile 5), and Castle Rock Aid (mile 11.3). The 10K has Castle Rock Aid at mile 2 and mile 4.5.
Registration opens September 23, 2025 and closes March 2, 2026. Listed registration fees are $69.00 for the Half Marathon and $49.00 for the 10K.
The courses use single-track and double-track trails within the Mammoth Bar area. The route includes steep climbs and descents and offers views of the American River Canyon. Visit the organization's website for the most recent information.