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Critical Mass 2019 Halloween Bike Ride | SF

Every Last Friday
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Friday, October 25, 2019 - 6:30 pm to 8:30 pm | Cost: FREE
Embarcadero Plaza (Formerly Justin Herman Plaza) | 1 Market Street, San Francisco, CA

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 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, October 25, 2019
San Francisco Critical Mass

Arguably Critical Mass San Francisco’s best event of the year is Critical Mass – Halloween.

Dress up, or come as you are.


– Any Bike (including Baywheels / Gobike or Jump Bike) or hell, any wheeled vehicle whose top speed isn’t much more over 20 mph
– Warm Clothes
– Bike Lights
– Water
– Food/Drinks
– Music/Speakers
– Helmet (Optional)


  • 6:30 pm: Gather
  • 6:45-7:00 pm: Roll out & ride random places around the city
  • 8:30/9:00 pm: Return to Embarcadero Plaza to ride with the roller skate crew along Embarcadero

Disclaimer: Please double check event information with the event organizer as events can be canceled, details can change after they are added to our calendar, and errors do occur.

Free / Learn More

Cost: FREE
Categories: *Top Pick*, Bike It, Halloween, San Francisco, Walks & Tours
Address: 1 Market Street, San Francisco, CA

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