Critical Mass is a large, monthly gathering of bike riders who ride through the city in parade fashion. Everyone is welcome to ride. Go for fun or to show your bike spirit.

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.

Read more about it at the Chicago Critical Mass website.

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