 Much of the marathon 's impact is derived from the tourism industry . More than 10 @,@ 000 of the runners in 2010 have indicated their first visit to Chicago . Of that , 6 @,@ 000 have come from 100 countries . Due to the travelers , the event increases hotel occupancy rates during the marathon . In the 2009 edition , the marathon contributed $ 150 million worth of activity . The local economy produced 1 @,@ 310 jobs . 
