Welcome to RFMBA!

The Roaring Fork Mountain Bike Association is dedicated to creating and sustaining the best possible mountain bike trail system in the Roaring Fork Valley.  Our territory ranges from New Castle to Aspen and from McClure Pass to Hagerman Pass.

Dig in with RFMBA to Support the Colorow Flow Trail

Colorow Flow is the working title for a pair of feature-filled, descent-optimized bike trails that will complement a new climbing trail, Stairway to Heaven, built in 2017. With the easy green climbing trail now in place, Colorow Flow will provide a fun beginner descent and an intermediate descent with optional difficult features.

Chief Colorow of the Ute Indians is the namesake for a steep local trail favored by hikers and expert riders. Colorow Flow will broaden the appeal of this growing trail system for younger and newer riders, while offering a unique experience for New Castle residents and visitors.

While most of RFMBA’s & New Castle Trails’ projects have utilized volunteers and hand tools, this project is expected to employ experienced trail contractors for major portions, and will be a focus project for 2018.


Support trails. Support RFMBA!

Annual Memberships, Business Sponsorships and Donations help RFMBA accomplish great things for trails and the mountain bike community!  Your Membership helps RFMBA to advocate for improving the trail system and increase our ability to partner on projects to maintain our existing trails and build new ones.   Thank you for supporting and aiding our efforts!

Our Trails
Check out MTBproject.com  for existing trails in our area.  This collaborative trail guide website currently shows many, although not yet all, of the best rides in our valley.  Post your rides, photos, and trail conditions today!

Use the following PayPal link to make a One-Time or Monthly-Recurring (tax deductible) donation to RFMBA. You will be redirected to PayPal’s secure server to complete your transaction.