The no. of events in sport was 8 . It was held in 28 July – 12 August 2012 . Fort Copacabana,241.5 km (150.1 mi) were the venues of Chicago Marathon . The sport has the official site www.hardrock100.com . 16 (from 6 confederations) were the number of teams who competed in Chicago Marathon . 1881; 138 years ago (1881) is when Chicago Marathon was established 
Chicago Marathon was a multiple day event