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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 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.
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All The News...
BMA supports BigTentBoCo: Every Voice Matters
The Boulder Mountainbike Alliance Board of Directors has voted to endorse the effort to place a measure on the ballot that would allow Boulder County voters to decide whether to expand the Board of County Commissioners from three members to five.
Town of Lyons Opposes Alternating Trail Use Pilot
On June 15, 2026, the Lyons Board of Trustees unanimously passed a resolution opposing the Boulder County Parks & Open Space Alternating Trail Use Pilot Project.
What the 2025 Visitor Study Tells Us About the Alternating Trail Use Pilot
Boulder County recently released its long-awaited Five Year Visitor Study, a system-wide look at who uses county parks and trails, how they use them, and what their experiences are like.
