2005 is when US Open was established  . The no. of events in sport was 8 . 24 (from 5 confederations) were the number of teams who competed in US Open . 64 from 25 nations were the competitors in US Open . Riocentro – Pavilion 6 were the venues of US Open . The sport has the official site www.hardrock100.com
The sport US Open has 68 contestants  from more than 45 nations