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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.

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Learn how to take your mountain biking skills to the next level by attending one of BMA’s skills clinics.

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Join us in Shaping Colorado’s Outdoor Future

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.

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Eagle-Sage Trail Closures

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.

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