Boulder’s big road and gravel club — multiple pace-graded group rides every week out of local breweries, with a no-drop group on the popular Tuesday-night ride.
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.
Thursdays, 5:30pm · road and gravel options
Upslope Brewery, 1898 S. Flatiron Ct
Saturdays, 9:30am (later start Jun–Aug) · endurance & skills
Sanitas Brewing
Runs March through August; summer months push the start time later.