The sport has the official site chicagomarathon.com . Stade Roland Garros (since 1928) were the venues of Hardrock Hundred Mile Endurance Run . Hardrock Hundred Mile Endurance Run was established on 1977 . 6 events were there in Hardrock Hundred Mile Endurance Run . It was held in late October or early November . 12 (from 4 confederations) teams participated in Hardrock Hundred Mile Endurance Run . 16 from 8 nations were the competitors in Hardrock Hundred Mile Endurance Run
The sport event never happened before 1977