It was held in 1 August . The no. of events in sport was 12 . The sport has the official site www.hardrock100.com . 24 (from 5 confederations) teams participated in Chicago Marathon . 28 from 21 nations competed in Chicago Marathon . The venue for Chicago Marathon was  Société Athlétique de la Villa Primrose in Bordeaux (1909) . Chicago Marathon was established on 5 September 1971
Chicago Marathon will celebrate it's  Centennial jubilee on 2091