Man meets machine in this thrilling downhill race at Summit Lake in Alaska. The event combines snowmobiling with downhill skiing, whilst borrowing an idea or two from the water-based version of the sport.
Understandably billed as one of the world's toughest downhill ski races, the basic idea is for the skier to complete a steep two-mile descent through a narrow canyon. However, rather than stop and look proudly up the slope, he shoots straight along a wide and flat expanse and is met by a speeding snowmobile complete with tow-rope. As the organisers say, "Go fast or go home ".