What is an artificial barrier over which men or horses leap as in a race?

An artificial barrier over which men or horses leap in a race is known as a "jump" or "jumping obstacle." These obstacles can take various forms, such as hurdles, fences, or ditches, and are commonly found in equestrian sports like show jumping or steeplechase racing. The purpose of these barriers is to test the agility and skill of the competitors as they navigate the course.