The Caldera is offered in three different lengths, ranging from 150 to 500 miles, following the beauty and geological rarities that the Eastern Sierra has to offer…


Date: September 27, 2019

Time: 7:00 am


Cost: Free

Event Website

Organizer: Fat Bike Mammoth



Mammoth Lakes

CA United States

It’s a 100% self-supported, multi-day, grassroots bikepacking adventure in the spirit of the Tour Divide. This is NOT a sanctioned or organized event. We simply offer the tools to help riders have a successful adventure and keep track of results for bragging rights.

We decided it’s about time to show off the majesty of our region to the world. After lots of bike riding, day dreaming, beer drinking, and mapping, we feel the Caldera 150/250/500 encompasses the rich beauty and geological rarities that the Eastern Sierra offers. The Southern 250 Loop is roughly 256 miles and 31k climbing. The Northern 250 Loop is actually much more than 250… in reality, it’s 317 miles and 38k climbing. The Full 500 is roughly 480 miles and 65k climbing.

Follow along live below: