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!
Events
Critical Mass
Stay in touch
Sign up for our free newsletter
More from Streetsblog San Francisco
Weekend Roundup: Speed Cameras Work, Transit Month Wraps…
...and Caltrain's video short on electrification and why rider's love it
Sunset Dunes, E-Bikes, and the Future of Cities
E-bikes could cut carbon, congestion, and costs—if cities take them seriously