Stepping Stone Purse Stepping Stone Purse The Stepping Stone Purse was an American Thoroughbred horse race held annually in the latter part of April at Churchill Downs in Louisville, Kentucky. Open to three-year-old horses, it was, along with the Derby Trial Stakes, one of two final prep races hosted by Churchill Downs running up to the Kentucky Derby. In 1959, Sword Dancer won the Stepping Stone Purse, then ran second in the Kentucky Derby before winning the Belmont Stakes. The following year, Bally Ache won this race then ran second in the Derby but won the Preakness Stakes. In 1969, future U.S. Racing
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