FYI, the Chicago Marathon just issued a press release indicating that less than 5000 spots remain available and that they expect registration to fill before the end of this week.
How To Run a Marathon: Step 1 - start running. There is no Step 2.
Registration for the 2011 Chicago Marathon has closed. Spots may still be available through qualified charities and through international tour operators. See the official marathon website (chicagomarathon.com) for details.
Cheers to all who registered for this year's race. October will be here before you know it!