It was held in 11 August – 28 August . 8 events were there in US Open . US Open was founded on 1884; 135 years ago (1884) . Pontal, Rio de Janeiro,54.5 km (33.9 mi) were the venues of US Open . The sport has the official site chicagomarathon.com
US Open event has celebrated it's  Palladium jubilee on 1959