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Advocating for trails and mountain biking in Boulder, Colorado since 1991
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BMA Member
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 one of our weekly group rides.
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…
Boulder Canyon Bridge Closure Puts Community at Risk
The unexpected closure of the Boulder Canyon Trail bridge has left users without a safe detour, raising serious concerns about being forced back onto Highway 119 and the need for immediate action to protect public safety.
You Made It Happen: Mini-Excavator Funded
Thanks to a ton of generous donors, we didn’t just meet our goal to purchase a mini-excavator. We exceeded it.
Invest Once, Build for Years
Boulder Mountainbike Alliance is raising funds to purchase a mini-excavator that will help build and improve more trails across Boulder County in 2026 and beyond.
