Critical Mass is a bike ride plain and simple. The ride takes place on the Last Friday Of Every Month.
The right of the people to assemble is guaranteed in the Constitution, and Critical Mass helps people remember that right. The Mass itself has no political agenda, though, no more than the people of any other community do. Critical Mass is open to all, and it welcomes all riders to join in a celebration of riding bicycles. Why? Because bikes are fun!
Chicago Critical Mass bike rides start from Daley Plaza, Dearborn & Washington at 5:30 pm on the last Friday of each month, regardless of season or weather. They are free and fun. All you have to do is show up with your bike.