About BMA

Photo by Marty Caivano

The Boulder Mountainbike Alliance exists to serve as a positive voice for mountain biking by making the trails in Boulder County a better place for all users.

We set these Trail Goals in 2005:

Our Trail Accomplishments as of 2009:

Our Humble Past

BMA was founded in 1991 as the Boulder Offroad Alliance (BOA). In 2006 the organization's name was changed to the Boulder Mountainbike Alliance to more accurately describe our focus and mission. We exist as a collaborative stewardship organization.

We design, build, and maintain trails for land management agencies in Boulder County. To date, we have completed more than 150 project days which contributed more than 24,000 hours of volunteer time. This is the equivalent of providing the land management agencies of Boulder County with a full time trail worker for more than twelve years.

We operate the BMA Bike Patrol in conjunction with land management agencies to support and educate trail users about appropriate trail use. BMA's Patrol has been in operation since 1996. We patrolled over 1,500 hours and covered almost 8,000 miles of trail in 2009.


BMA holds membership meetings and parties March-October at various locations throughout Boulder. See the events page for info on the next meeting and other BMA events. For immediate notices about BMA meetings and events subscribe to the BMA Email Newsletter.


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

Board of Directors

The Boulder Mountainbike Alliance is a State of Colorado registered 501(c)(4) Non-profit Corporation run by its membership under the direction of the Board of Directors and its subcommittees. All positions are filled by volunteers.