October 9, 2011
October 10, 2010. That's according to the Bank of America Chicago Marathon office as of this morning, 28 August 2009. The 2011 date is also on Columbus Day weekend, October 9, 2011.
Chicago marathon is on Sunday 11 October 2009
Moses Mosop won the 2011 Chicago marathon in 2:05:37.
Chicago Half Marathon happened on 2011-09-11.
October 9, 2011
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.
October 14, 2012
12756
Yes, if you use the Chicago Marathon 2010 as a qualifier for the Boston Marathon and your birth date is August 25, 1956, you can qualify using the 55-year-old female time. For the 2011 Boston Marathon, the qualifying time for women aged 55-59 was 4:00:00. If your Chicago Marathon time was 4:00:00 or faster, you would meet the qualifying standard.
next year try the iaaf website or chicagomarathon
It is generally the day before Columbus Day, which in 2013 is the 14th so the marathon is probably 11/13