"Critical Mass is a cycling event typically held on the last Friday of every month; its purpose is not usually formalized beyond the direct action of meeting at a set location and time and traveling as a group through city or town streets on bikes.

The first critical mass originated in 1992 in San Francisco. By the end of 2003, the social movement has being held in over 300 cities around the world." Wikipedia

2018 Dates:
August 31, 2018
September 28, 2018
October 26, 2018
November 30, 2018