Horse racing is an equestrian sport, involving two or more jockeys riding horses over a set distance for competition.
It is one of the most ancient of all sports and its basic premise - to identify which of two or more horses is the fastest over a set course or distance - has remained unchanged since the earliest times.
Horse races vary widely in format. Often, countries have developed their own particular horse racing traditions. Variations include restricting races to particular breeds, running over obstacles, running over different distances, running on different track surfaces and running in different gaits.