Mammoth TUFF Adventure Festival Set for September 2026

The Mammoth TUFF adventure festival is scheduled for September 18-20, 2026, in Mammoth Lakes, California. This event, now in its fifth year, serves as a UCI Gravel World Series qualifier and promises an exhilarating experience in the Eastern Sierra's stunning landscape.

Participants can choose from three courses: the TUFF short course of approximately 40 miles, the TUFFER medium course of 67 miles, and the TUFFEST long course of 89 miles. Each route offers scenic views of geothermal hot springs, red rock canyons, and volcanic landscapes, catering to both competitive racers and casual riders.

The festival weekend will also include pre-ride activities, registration, and the Mammoth BUFF Beer Mile on September 18. Following the rides on September 19, there will be award ceremonies and a raffle on September 20, with options for participants to extend their stay and enjoy Mammoth Mountain's Bike Park.