 There were 314 tracks operating in the United States by 1890; and in 1894, the American Jockey Club was formed.The Pleasanton Fairgrounds Racetrack at the Alameda County Fairgrounds is the oldest remaining horse racing track in America, dating from 1858, when it was founded by the sons of the Spaniard Don Agustín Bernal.Belmont Park is located at the western edge of the Hempstead Plains.