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Advocating for trails and mountain biking in Boulder, Colorado since 1991
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BMA has a ton of cool stuff happening all season.
Sign up for a trail building event to put your muscle to good use.
Join us on a group ride.
Learn how to take your mountain biking skills to the next level by attending one of BMA’s skills clinics.
See the other fun stuff we’re planning!
Upcoming Events
All The News…
Last Chance to Speak up for New Open Space Near Erie
If you support public access to the East Boulder Creek/Prairie Run Open Space near Erie, you have one last opportunity to voice your support before the Boulder County Commissioners make a final decision on March 28.
Join us in Shaping Colorado’s Outdoor Future
Join us in shaping Colorado’s outdoor future by participating in CPW’s survey to develop a comprehensive recreation plan that informs funding eligibility and reflects our shared commitment to recreation enjoyment and conservation.
Eagle-Sage Trail Closures
In early to mid-February, OSMP will close the Eagle Trailhead and sections of the Eagle and Sage Trails north of the city for maintenance and repair work over the next three months.