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San Francisco Critical Mass

Every last Friday of the month

Critical Mass is a mass bicycle ride that takes place on the last Friday of each month in San Francisco starting at 5:30 pm at Justin Herman Plaza (foot of Market Street) and in cities around the world. Everyone is invited. No one is in charge. Bring your bike.

Please Note: Critical Mass tends to practice extreme bike power by taking to the streets and riding in the car lanes causing endless annoyance to motorists.

In San Francisco especially, this event can get HUGE. Consider this is fair warning to stay away from driving in the downtown SF area on the last Friday of every month.

Friday, December 28

San Francisco Critical Mass
Friday, December 28 – 5:30 pm | Cost: FREE | Embarcadero Plaza
San Francisco Critical Mass

Critical Mass is a mass bicycle ride that takes place on the last Friday of each month in San Francisco starting at 5:30 pm at Justin Herman Plaza (foot of Market Street) and in cities around the world. Everyone is invited. No one is in charge. Bring your ...Monthly

Friday, January 25

San Francisco Critical Mass
Friday, January 25 – 5:30 pm | Cost: FREE | Embarcadero Plaza
San Francisco Critical Mass

Critical Mass is a mass bicycle ride that takes place on the last Friday of each month in San Francisco starting at 5:30 pm at Justin Herman Plaza (foot of Market Street) and in cities around the world. Everyone is invited. No one is in charge. Bring your ...Monthly


This event is scheduled every last Friday of the month:
Please be aware that recurring events like this may occasionally be cancelled or postponed by the promoter - especially on holidays. We always suggest you contact the promoter or venue to confirm for a particular day.

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