Lifestyle Ten Awesome Critical Mass Instagram Photos By Shaina Tsan | September 28, 2012, 11:52 pm @bexinsf Pages: 1 2 3 4 5 6 7 8 9 10 Tag: Bicyclists, Critical Mass, Instagram, San Francisco From Our Sponsors UPCOMING EVENTS SEP 16 Pulp at Bill Graham Civic Auditorium SEP 28 Portola Music Festival at Pier 80 MAY 19 Sammy Obeid at San Jose Improv The Best Events Every Week in Your Inbox Thank you for subscribing!