Iroquois Stakes (Churchill Downs) race has been run at a distance of mile. The Iroquois (pronounced "Ear-Ah-Coy") is named for Iroquois, the first American horse to win the English Epsom Derby. Iroquois Stakes (Churchill Downs) The Iroquois Stakes is an American Thoroughbred horse race which is the first graded stakes race for Thoroughbred horses on opening day at the Churchill Downs Fall Meet. This first day every fall is devoted entirely to two-year-old racing. The race is a Road to the Kentucky Derby Prep Season qualifying race. The winner receives 10 points toward qualifying for the Kentucky Derby. Prior to 2013 the race was
American Quarter Horse hence the nickname. Horses listed in the appendix may be entered in competition, but offspring are not initially eligible for full AQHA registration. If the Appendix horse meets certain conformational criteria and is shown or raced successfully in sanctioned AQHA events, the horse can earn its way from the appendix into the permanent studbook, making its offspring eligible for AQHA registration. Since Quarter Horse/Thoroughbred crosses continue to enter the official registry of the American Quarter Horse breed, this creates a continual gene flow from the Thoroughbred breed into the American Quarter Horse breed, which has altered many of the characteristics