It was held in late October or early November . The sport has the official site chicagomarathon.com . 12 (from 4 confederations) teams participated in Hardrock Hundred Mile Endurance Run . The no. of events in sport was 6 . 1977 is when Hardrock Hundred Mile Endurance Run was established  . 16 from 8 nations competed in Hardrock Hundred Mile Endurance Run . The venue for Hardrock Hundred Mile Endurance Run was Stade Roland Garros (since 1928)
Hardrock Hundred Mile Endurance Run was held in Stade Roland Garros (since 1928)