LONGBOARD comes from skateboard. Extended and steadier decks adapted to distance and speed. They permit longboarders to find a compromise between pleasure and eco-moving. It has been invented by californian surfers missing waves in the 70's.
Contrary to street skate that usually takes place in pedestrian zones, commercial centers, school or industrial areas, downhill takes place on the road. We don't skate stairs, nor pools of rails, but roads. Ideally steep and winding.