Chicago is the world's biggest- they start it at about 6:30am and it goes all day, until about 4:30pm or so. It's a full on event, where they usually have to close down a good part of the Drive and the lakefront. I think there were in excess of 8000 participants last year too, and they did have a category for kids, families, teams, and individuals (professional and amateur). We do all right here.
Koffee