The sport has the official site chicagomarathon.com . It was held in 1888–1891,(1888: 5 canonical) . 12 (from 4 confederations) were the number of teams who competed in Equestrianat the Games of the XXXI Olympiad . 60 from 34 nations were the competitors in Equestrianat the Games of the XXXI Olympiad . The venue for Equestrianat the Games of the XXXI Olympiad was Riocentro – Pavilion 6 . 1891; 128 years ago (1891) is when Equestrianat the Games of the XXXI Olympiad was established  . The no. of events in sport was 18
The sport Equestrianat the Games of the XXXI Olympiad has less than66 contestants  from 34 nations