Organizers will close registration once they reach 45,000 registered participants. U.S. runners pay $145 to participate. Those who live outside the U.S. pay $170.
Last year, the marathon reached its registration capacity in just 51 days. The 34th annual event will be held on Sunday October 9, 2011. To register, visit chicagomarathon.com beginning February 1 at midnight.
