It was held in late October or early November . 6 events were there in Hardrock Hundred Mile Endurance Run . The official site of Hardrock Hundred Mile Endurance Run is chicagomarathon.com . 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 competed in Hardrock Hundred Mile Endurance Run . 1977 is when Hardrock Hundred Mile Endurance Run was established 
6 events were held in Hardrock Hundred Mile Endurance Run