BMA — the volunteer-run nonprofit advocate for mountain biking in Boulder County. Free, open-to-all group rides several nights a week from spring through fall, graded green/blue/black with ride guides and sweeps.
Wednesdays, 6:00pm · casual green-level ride, beginner-friendly · Apr–Sep
Rotating Boulder County trailheads
Free and open to all, members and non-members alike. Green = little climbing, no exposure, good for newer riders. Trailhead changes weekly (posted on Meetup).
Tuesdays, 6:00pm · women’s ride, green/blue · Apr–Sep
Rotating Boulder County trailheads
Women’s group ride with a ride guide; pace and trailhead posted weekly on Meetup.
Thursdays · intermediate-to-advanced (blue/black) ride, brewpub after · Apr–Sep
Rotating Boulder County trailheads
The harder weekly ride, ending at a local brewpub. Start time and trailhead vary by week — confirm on the BMA Meetup before heading out.