A hand-picked starting point — the most welcoming, iconic, or just plain great outdoor groups in Boulder.
Sundays · 8:00am summer (Jun–Sep), 9:00am winter · long & short routes, snacks + coffee after
East Boulder Community Center, 5660 Sioux Dr
Start shifts to 9:00am from October through May. Route options run from short loops to dirt trails.
Tuesdays, 5:30pm · A/B/C pace groups, last group is no-drop
Twisted Pine Brewery
Riders split into 18–20, 16–18, and 14–16 mph groups; only the last (C) group is explicitly no-drop.
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).