Silverton, Colorado,Olympic Indoor Hall (artistic and trampoline) were the venues of Hardrock Hundred Mile Endurance Run . The no. of events in sport was 6 . The sport has the official site chicagomarathon.com . It was held in 2 August . 1884; 135 years ago (1884) is when Hardrock Hundred Mile Endurance Run was established 
The sport event never happened before 1895