AMA Supercross Contest is an American motorbike series. Supercross is one of the main motorbike races, along with motorbike speedway & motorbike road races. The Supercross race series was established and authorized by the American Motorcyclist Association in the year 1974. Supercross is an outcome of the sport of motocross which occurred on normal ground, congested tracks. Supercross bike races consist of rotten-track motorbikes on non-natural, hand-made dirt courses including obstacles & steep jumps. AMA Supercross Contest is supported by Monster Energy and it starts in January to the start of May in the main association baseball & football arenas. With not the difficulty & convenience and ease of these arena locations resulted that from the end of 1970, Supercross had exceeded motocross as a fan appeal in the US.