2018 Kentucky Derby 2018 Kentucky Derby The 2018 Kentucky Derby (officially, the 2018 Kentucky Derby presented by Woodford Reserve) was the 144th running of the Kentucky Derby, and took place on Saturday, May 5, 2018, in Louisville, Kentucky. The field was open to 20 horses, with a purse of million. The Derby is held annually in Louisville on the first Saturday in May, at the end of the two-week-long Kentucky Derby Festival. It is a Grade I stakes race for three-year-old Thoroughbreds at a distance of , and has been run at Churchill Downs racetrack since its inception in 1875. 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