What is TUFF?

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 will circle the famous caldera. The medium and long courses travel through the Volcanic Tableland formed by the Long Valley Caldera. Prepare to be transported back in time.


Our country has taken liberty to protect the public lands throughout the Eastern Sierra and preserve the vast playground for future generations of explorers, naturalists, and visitors. Because of this, 10% of the entry fee will go directly back to the land. As riders wind through wide open roads, they will take pride in knowing they are giving back.


Payahuunadü is Paiute for the Owens Valley and Eastern Sierra region of California.
Payahuunadü means "land of the flowing water".


Payahuunadü has been the home to the Paiute and Shoshone people since time immemorial.


This land is your land...


This land is our land...

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United States Department of Agriculture


INYO National Forest




Mammoth Lakes Ranger District is located in the northern half of Inyo National Forest, and is centered around the town of Mammoth Lakes, CA.


U.S. Department of the Interior


Bureau of Land Management


The Bishop Field Office cares for a unique vestige of wild California, emphasizing conservation, education and partnerships. BLM's mission is to sustain the health, diversity and productivity of the 750,000 acres of public lands they are entrusted to manage.


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