Chicago Critical Mass
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.
Critical Mass Grand Rapids
Home of the Grand Rapids, Michigan, Critical Mass ride. Site features info, photos, and flyers. Also includes links to other Michigan CM sites.
Critical Mass in Bergen
Site no longer updated but has historical information on this groups efforts.
Pedaling to Save the City
An examination of San Francisco's Critical Mass bicycling event in the context of the global fight against automobile dependency
Worldwide Critical Mass Hub
Comprehensive guide to local Critical Mass sites in cities all over the world. Also includes links to worldwide CM, pro-bike, and anti-car sites.
Yahoo! Groups: Critical Mass
Message board for Critical Mass issues around the world.