Organizers estimated that roughly 20,000 people took advantage of a car-free morning on Lake Shore Drive in Chicago and pedaled through the fog on Sunday.
A similar event will be held in Madison on Sunday. A loop of about six miles on streets near the Capitol will be closed to motor vehicles from 10 a.m. to 3 p.m. and opened to bikers, walkers and skaters. In August, about 50,000 people joined Lance Armstrong for a Ride the Drive in Madison.
The Ride the Drive and the Miller Lite Ride for the Performing Arts will start Bike to Work Week activities in Wisconsin.