LaSalle Bank Chicago, IL (35,000). The Chicago Marathon has become so popular they’ve capped the field, and the slots often fill up by June (the race is in October). Your entry is guaranteed if you’re running for one of the 60 different charities affiliated with the race.

Have you run this race before? Tell others about it!

You can contribute in several ways:

• Write about your experience on this page (just click EasyEdit to start typing)
• Post a comment or question about the race, the route, pre-race events, organization, difficulty level, etc.

• Share photos of you or your friends on the run!