Home Community Events SF Critical Mass Bicycle RideEvent Details SF Critical MassEmbarcadero Plaza (Formerly Justin Herman Plaza)Market Street and Steuart StreetSan Francisco, CA 94105United StatesEvent LinkShare: facebook twitter linkedin email Critical Mass is a mass bicycle ride that takes place on the last Friday of each month in cities around the world. Everyone is invited! No one is in charge! Bring your bike!Event TypeCommunity Event