Draft horse showing (UK and Commonwealth; draught horse, dray horse or carthorse) refers to horse shows exclusively for horses of the draft horse breeds. In North America the term "Draft horse showing" refers to a specific horse show competition with the competitors driving their horses under harness.
Draft horse shows are different from draft horse pulling competitions, where teams of horses compete to determine who can pull the most weight.
A draft horse (US) or draught horse (UK), also known as dray horse, carthorse, work horse or heavy horse, is a large horse bred to be a working animal hauling freight and doing heavy agricultural tasks such as plowing. There are a number of breeds, with varying characteristics, but all share common traits of strength, patience, and a docile temperament.
While indispensable to generations of pre-industrial farmers, draft horses are used today for a multitude of purposes, including farming, draft horse showing, logging, recreation, and other uses. Draft breeds have been crossbred with light riding breeds such as the Thoroughbred to create sport horses or warmbloods. While most draft horses are used for driving, they can be ridden and some of the lighter draft breeds are capable performers under saddle.