A halfpipe is a U-shaped structure used in various action sports, including snowboarding, skateboarding, and BMX. It consists of two sloped sides that rise from a flat bottom, allowing athletes to perform tricks and maneuvers as they ride up and down the walls. The design enables riders to gain momentum and height, making it ideal for showcasing skills. Halfpipes can be found in many locations, such as ski resorts and skate parks. They vary in size and construction materials, with some made of wood and others of concrete or metal. Competitions often feature halfpipes, where athletes demonstrate their abilities to judges and spectators.