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Critical Mass

On the last Friday of each month, bicyclists in San Francisco (and about 200 like-minded cities world-wide) gather at the north end of Market Street on the Embarcadero and ride en masse to some destination, demonstrating their right to use the roads. If you are driving in SF on a Critical Mass day, you will want to listen for radio traffic reports, but if you are stopped by the mass the best thing to do is maintain a good sense of humor and remember that it will all pass in about 5 minutes. Tempers can and do flare, and there have been cases where run-ins with drivers and bicyclists have gotten violent. If your car is surrounded by bikes, definitely do not move until they have passed or they might feel threatened.

Listing from Wikivoyage: San Francisco, CC BY-SA 4.0.

Updated 27 Sept 2026. Something wrong? Tell us.