About BMA

BMA is the positive voice for mountain biking in the Boulder, Colorado area

BMA is the positive voice for mountain biking in the Boulder Colorado area

Our Mission

The Boulder Mountainbike Alliance’s mission is to serve as a positive voice for mountain biking in the greater Boulder Colorado area by improving the trail experience for all users through group rides and events, advocacy, and trail building.

We Create Community

BMA connects you to other mountain biking enthusiasts and shares the trail love by offering social events, group rides, skills clinics, and more.

We advocate for access

BMA has made great strides toward achieving better trails for Boulder County with numerous advocacy successes, but there’s always more to do. And we need your help to do it.

We Build More fun trails

BMA works on trail expansion and improvements. We partner with land managers to make the projects happen. Our goal is to have more great trails available for all types of riders.


Our organization was founded in 1991 as a grassroots solution to preserving local trail networks from closing to mountain bikers.


BMA has become a force dedicated to the mountain bike community. We are leading initiatives to build, maintain, and ride more fun trails.


Contributing over 2,000 hours of volunteer labor in 2018, BMA is an important partner to public land managers across the state.


Our expansive network of dedicated volunteers stands ready to build, teach, lead rides, and advocate for trails throughout the year.

BMA’s Vision is More Fun Trails. Here’s what that means.

Fun Trails do…

Use the landscape to twist and wind providing a sense of exploration.

Let trail users experience scenery, beauty, and wildlife – and lead to places folks want to go, like overlooks or other points of interest.

Connect to other trails and trail systems.

Make the riding enjoyable for a broad spectrum of riders and incorporate features or obstacles that work for the trail including:

  • Flowy singletrack.
  • Shuttle-able routes, loops, ride-ability from town.
  • Optional lines, berms, jumps, kickers, and hucks.
  • Directional trails when applicable and if it provides a meaningful challenge.
  • Stay open because they are properly designed and drain well.

Fun Trails Don’t…

Cause deterioration or unnecessary erosion to the landscape, such as widening, braiding or water damage due to poor water management.

Create user conflict.


In August 1991, Boulder Offroad Alliance was incorporated as a Colorado 501(c)(4) non-profit. Changing its name to the Boulder Mountainbike Alliance in 2007, the organization has continued to serve the community in the Boulder area. In April 2013, BMA was recognized by the Internal Revenue Service as tax-exempt under Section 501(c)(3) of the Internal Revenue Code as a public charity, making your contributions to BMA tax deductible to the fullest extent permitted by law.

The Boulder Mountainbike Alliance is a 501(c)(3) non-profit membership organization, EIN 84-1240757


Equity, Diversity and Inclusion

Anti-Harassment and Anti-Discrimination Policy


Boulder Mountainbike Alliance
P.O. Box 4954, Boulder, CO 80306-4954

The Boulder Mountainbike Alliance is a 501(c)(3) non-profit membership organization, EIN 84-1240757