18 events were there in US Open . 11 from 2 nations were the competitors in US Open . 1884; 135 years ago (1884) is when US Open was established  . The venue for US Open was Georgia Dome,New York City, New York,,United States . 24 (from 5 confederations) were the number of teams who competed in US Open . The official site of US Open is chicagomarathon.com
Less than 0 nations participated in the event