Registration should be open around the 2nd week of February
It sold out on March 24 for the 2010 Chicago Marathon. Registration opened on 2-1-2011 for this year.
Registration for the Bank of America Chicago Marathon began on February 1st. See the related article.
The winner of the 2012 Chicago Marathon, Kebede from Ethiopia, won $100,000 plus $50,000 for setting a new record.
Sunday, October 11, 2010 http://www.runtri.com/2009/01/Chicago-marathon-2009-registration-and.html
Moses Mosop won the 2011 Chicago marathon in 2:05:37.
To give you and idea - registration opened September 9th for the 2010 marathon. see: http://running.competitor.com/2009/09/news/2010-boston-marathon-registration-open_5297
Chicago Half Marathon happened on 2011-09-11.
October 9, 2011
October 9, 2011
Sunday, October 11, 2010 http://www.runtri.com/2009/01/chicago-marathon-2009-registration-and.html
You should register for the Bank of America Chicago Marathon as early as possible. This year, registration began on February 1st and last year it closed in late March.
12756