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 MAY 03 Pardon The Interruption Live at Rancho NIcasio at Rancho Nicasio APR 27 San Francisco Comedy Attic - Every Saturday at Eclectic Box SF The Best Events Every Week in Your Inbox Thank you for subscribing!