Many types of obstacles are found in competitive horse jumping sports such as show jumping, hunter classes, and the cross-country phase of eventing. The size and type of obstacles vary depending on the course designer and the expected difficulty level of a particular competition. Horses will need to negotiate many types of obstacles in order to be successful in jumping sports.
Fences used in show jumping are often brightly colored and artistically designed, while hunter and eventing fences are generally made to look rustic and natural. Show jumping and hunter obstacles are constructed to fall down if struck by the horse, whereas eventing obstacles have traditionally been solidly built—though to prevent dangerous rotational falls, certain elements are now being designed to break away when hit.