Racing of Quarter Horses. It originated among British settlers in Virginia shortly after Jamestown was established in 1607. The course was traditionally a quarter-mile (400 m); today there are 11 officially sanctioned races, ranging from 220 to 870 yd (201 to 796 m). Timing is to the nearest .01 second
Horse racing is a sport in which horses ridden by people called jockeys run in races, sometimes jumping over fences. a sport in which horses with riders race against each other flat racing, steeplechase steeplechase, jockey jockey. Sport of running horses at speed. Typically, Thoroughbreds are raced with a rider astride and Standardbreds with the horse pulling a conveyance with a driver. Though racing has an ancient lineage, the first regularly organized national races were established in England under Charles II (r. 1660-85), and the first in North America were held on Long Island in 1665. These early races were match events between two or three horses and were run in heats; a horse had to complete at least two heats to be judged the winner. By the mid-18th century, larger fields of runners and single-race "dash" events were the norm. Handicap racing emerged in the mid-18th century as well, as gambling came to be a standard part of horse racing. Pari-mutuel betting was instituted in the 20th century. Thoroughbred racing, conducted on a flat, elliptical, mile-long track, attracts the largest purses, followed by harness racing and quarter-horse racing. The most important U.S. Thoroughbred races are the Kentucky Derby, Preakness Stakes, and Belmont Stakes. See also steeplechase