Use this calendar for planning purposes only.
Event details subject to change!
To confirm event status (sold out, cancellations, schedule changes, COVID restrictions, etc.), visit the event website link below.
- This event has passed.
An event every year that begins at 12:00 am on day third of September, repeating until September 20, 2025
Mammoth TUFF is an adventure through the hills of the Eastern Sierra. From the iconic town of Mammoth Lakes and rolling through the TUFF terrain of the Long Valley Caldera.
What is tuff?
Tuff (tŭf) is a general term for all consolidated pyroclastic, volcanic rocks.
The name, Mammoth TUFF, is a nod to the Long Valley Caldera and the volcanic stone that defines ‘gravel’ in the area. The caldera was formed about 760,000 years ago in a volcanic eruption from which the magma still underlies it, heating underground water and fueling hot springs the event will ride by. The short course is around 45 miles with 2,000 feet of climbing and will circle the famous caldera. The long course is around 100 miles with 8,000 feet of elevation gain and travels through the Volcanic Tableland formed by the Long Valley Caldera. Prepare to be transported back in time on an old stagecoach route used by miners and even further back past Native American petroglyphs left by ancestors of the Paiute-Shoshone tribe.
Shakeout Ride, Registration, and Rider Meeting
Event Day – Short and Long Courses
-Join the Oktoberfest when done
TUFF Awards and Survivors Morning Mingle
We want to build a TUFF community of Gravel Riders that can take on any event, although this might be the TUFFest. All TUFF riders will be expected to be self-sufficient. This means you will carry all individual items (Nutrition, Hydration, Clothing, ETC) necessary for up to 50 miles at a time.
To confirm event status (sold out, cancellations, COVID restrictions, etc.), be sure to visit the event website above.