Equestrianat the Games of the XXXI Olympiad was founded on 1884; 135 years ago (1884) . The sport has the official site chicagomarathon.com . 3 events were there in Equestrianat the Games of the XXXI Olympiad . 28 from 18 nations were the competitors in Equestrianat the Games of the XXXI Olympiad . The venue for Equestrianat the Games of the XXXI Olympiad was Olympic Indoor Hall (artistic and trampoline) . 18 – 30 September 1988 was when it was held
10 games were held in Equestrianat the Games of the XXXI Olympiad