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!
Next San Francisco Critical Mass : June 30th, 2023, 5:30pm, at Embarcadero Plaza (foot of Market Street).
San Francisco Critical Mass celebrates 30 years of urban cycling this month. See you at the Embarcadero (formerly Justin Herman) plaza this Friday, September 30th.