1977 is when Hardrock Hundred Mile Endurance Run was established  . The sport has the official site chicagomarathon.com . It was held in late October or early November . 6 events were there in Hardrock Hundred Mile Endurance Run . 12 (from 4 confederations) teams participated in Hardrock Hundred Mile Endurance Run . The venue for Hardrock Hundred Mile Endurance Run was Stade Roland Garros (since 1928) . 16 from 8 nations were the competitors in Hardrock Hundred Mile Endurance Run
The number of squad in the sport Hardrock Hundred Mile Endurance Run is 16