Horse racing in the United States Horses and inspired their name. With the exception of the longer, distance contests, Quarter Horse races are run flat out, with the horses running at top speed for the duration. There is less jockeying for position, as turns are rare, and many races end with several contestants grouped together at the wire. The track surface is similar to that of Thoroughbred racing and usually consists of dirt. The traditional high point of US horse racing is the Kentucky Derby, held on the first Saturday of May at Churchill Downs in Louisville, Kentucky. Together, the Derby; the Preakness Stakes, held two
American Quarter Horse from 220 to 870 yards. Thus, they have long legs and are leaner than their stock type counterparts, but are still characterized by muscular hindquarters and powerful legs. Quarter Horses race primarily against other Quarter Horses, and their sprinting ability has earned them the nickname, "the world's fastest athlete." The show hunter type is slimmer, even more closely resembling a Thoroughbred, usually reflecting a higher percentage of appendix breeding. They are shown in hunter/jumper classes at both breed shows and in open USEF-rated horse show competition. There are several genetic diseases of concern to Quarter Horse breeders: American Quarter Horse