Critical Mass is an informal bike group that meets the last Friday of every month to ride around the city, raise awareness and advocate for a bicycle-friendly urban environment. All bikes are welcome. criticalmasshouston.com
Bayou Bikers meet at Market Square Park on the first Sunday of the month for 25- to 40-mile bike rides exploring the bayous of Houston. Rides are open to all. Mountain bikes or bikes with fat tires are necessary. This is an informal group whose purpose is to show Houstonians and visitors the beauty of Houston's waterways.