Chicago Critical Mass: Advocacy group that features news, events and information on the group's activities, press releases, annual art show, and contacts. Also, offers a photo gallery, flyers and FAQs.
Chicago Cycling Club: Social club dedicated to promoting safe group cycling while highlighting the city as a viable place to tour.
Chicagoland Bicycle Federation: Regional bicycle advocacy for the City and Northeastern Illinois.
CUBS - Chicago Urban Bicycling Society: Participate in RAGBRAI - Registers Annual Great Bike Ride Across Iowa. Site contains photo gallery, archive, riding events calendar and membership information.
Cycling Sisters: Advocacy group that supports the increase of female bike commuters in the city by providing educational programs, maintenance classes, support and networking.
Late Ride: Starting from Buckingham Fountain at Congress and Columbus Drive in Chicago and going for 25 miles through many Chicago neighborhoods. The area's only after-midnight non-competitive bicycle ride.
Working Bikes Cooperative: Non-profit volunteer organization recovers donated and landfill-bound bicycles, repairs them to working condition, and sells them to Chicagoans at a low cost in order to fund shipments of bicycles and bike parts to developing countries. Discussion forums, surveys, fun facts and projects are showcased.
XXX Racing: A USA Cycling group that is comprised mainly of bike messengers.