The sport has the official site www.hardrock100.com . It was held in 19–20 August . Tennis Club de Paris, at Auteuil (some of the years 1895–1908),Chicago, Illinois, United States,Arena Olímpica do Rio were the venues of Chicago Marathon . The no. of events in sport was 18 . 12 teams competed in Chicago Marathon . 37 from 31 nations were the competitors in Chicago Marathon . Chicago Marathon was established on 1891; 128 years ago (1891)
There are less than 19 teams in sport Chicago Marathon