Lifestyle Ten Awesome Critical Mass Instagram Photos By Shaina Tsan | September 28, 2012, 11:52 pm @myofclothing Pages: 1 2 3 4 5 6 7 8 9 10 Tag: Bicyclists, Critical Mass, Instagram, San Francisco From Our Sponsors UPCOMING EVENTS SEP 28 Portola Music Festival at Pier 80 MAY 03 Pardon The Interruption Live at Rancho NIcasio at Rancho Nicasio APR 27 Bit City Comedy at Mr. Bing's at Mr. Bing's The Best Events Every Week in Your Inbox Thank you for subscribing!