Halloween weekend kicks off with the most colorful and often the funnest Critical Mass ride of the year. If you haven't experienced Halloween Critical Mass check out this Streetfilm from two years ago. Gather at 5:30 p.m. at Justin "Pee Wee" Herman Plaza. Ride usually starts at 6.
Events
Halloween Critical Mass
By Bryan Goebel
Stay in touch
Sign up for our free newsletter
More from Streetsblog San Francisco
Weekend Roundup: Caltrain Bike Advisors, Advocates Reach out to Supervisor Wong…
...and Alameda wants your feedback on the Pacific Ave. greenway
December 5, 2025
