Churchill Downs to help him run the rack was Col. Matt Winn of Louisville. Churchill Downs prospered and the Kentucky Derby then became the preeminent stakes race for three-year-old thoroughbred horses in North America. During that early period, a new clubhouse was built in order to promote social interaction, and new events such as steeplechases, automobile races, and band concerts were held at the track. The State Fair was held on the grounds, featuring the odd spectacle of two locomotives being intentionally crashed head-on in the infield. On June 5, 1907, African American jockey James Lee set a record that has never
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