Welcome to the CBMBA Winter Site!

The Crested Butte Mountain Bike Association is the oldest mountain bike club in the world! Founded in 1983, CBMBA has grown into a full-blown trails organization. In summer, we are the primary caretakers for the 450+ miles of singletrack around CB.


In winter, CBMBA grooms free winter trails for all users in the Upper Gunnison Valley. You can cross-country ski, snowshoe, walk, or run on our trails, but, in particular, we groom them so that you have a place to go fat biking! Our list of Winter Trails is a comprehensive list of where YOU can go fat biking for FREE in the Gunnison Valley.


  • Because the trails are multi-use, please be sure you brush up on your Winter Trail Etiquette before you head out so that we all get along.
  • Also, check out our Winter Trail Report for current conditions.
  • If you’re out there and see something of note, drop us an Observation!

Like what you see us and want us to continue to groom free winter trails for the public? Or want to help us ensure our summer trails are sustainable? Please support us by becoming a member or making a donation today!


Donate Now

Want to know more about summer?

Check out our Summer Home Page for more on events and volunteer trail work days, our summer trail and stewardship crew (the Crested Butte Conservation Corps), and happenings.



Enter email address in the box below and click ‘STAY TUNED’ to get the latest in workdays, trail info, events, advocacy and more!