Used in open-gaited horse shows, the Rocky Mountain Horse actually got its start in Kentucky, used to plow fields, herd cattle, travel over steep and rugged trails, and drive the buggy.
The very large Shires are popular and skillful draft animals.
Longer and more muscular than Thoroughbreds, the Standardbred, is primarly used in harness racing.
The large, easy-going Suffoks can be used for heavy hauling.