Dirt bike racing includes many different disciplines and series. The two most popular forms are Supercross and motocross followed by several other off-road racing disciplines including Grand National Cross Country (GNCC), National Enduro, Sprint Enduro, Big 6 Grand Prix, National Hare & Hound, West Hare Scrambles, EnduroCross, trials, hard enduro, and the World Off-Road Championship Series (WORCS).
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