The sport has the official site www.hardrock100.com . 28 July – 12 August 2012 was when it was held . The no. of events in sport was 8 . Chicago Marathon was established on 1881; 138 years ago (1881) . 16 (from 6 confederations) were the number of teams who competed in Chicago Marathon . Fort Copacabana,241.5 km (150.1 mi) were the venues of Chicago Marathon
Chicago Marathon event has celebrated it's  Platinum jubilee on 1951