There were seventeen officers in all riding in this race. The race course was a large three-mile ring of the form of an ellipse in front of the pavilion. On this course nine obstacles had been arranged: the stream, a big and solid barrier five feet high, just before the pavilion, a dry ditch, a ditch full of water, a precipitous slope, an Irish barricade (one of the most difficult obstacles, consisting of a mound fenced with brushwood, beyond which was a ditch out of sight for the horses, so that the horse had to clear both obstacles or might be killed);