Hardrock Hundred Mile Endurance Run was established on 1963 . 136 from 25 nations competed in Hardrock Hundred Mile Endurance Run . 17 teams competed in Hardrock Hundred Mile Endurance Run . The venue for Hardrock Hundred Mile Endurance Run was Riocentro – Pavilion 6 . The official site of Hardrock Hundred Mile Endurance Run is chicagomarathon.com . It was held in 11 August – 28 August
The sport Hardrock Hundred Mile Endurance Run has more than68 contestants  from more than 3 nations