Hardrock Hundred Mile Endurance Run was established on 1977 . The sport has the official site chicagomarathon.com . 12 (from 4 confederations) were the number of teams who competed in Hardrock Hundred Mile Endurance Run . 6 events were there in Hardrock Hundred Mile Endurance Run . Stade Roland Garros (since 1928) were the venues of Hardrock Hundred Mile Endurance Run . It was held in late October or early November . 16 from 8 nations were the competitors in Hardrock Hundred Mile Endurance Run
The sport Hardrock Hundred Mile Endurance Run has 16 contenders  from more than 1 nations