The Patrouille des Glaciers - World's hardest alpine race
The racetrack in the Swiss Alps heads over 53km with a difference in altitude of more than 8000m. The event is organized every two years by the Swiss army and is open for military and civil teams. The race is held in two variants: The big racetracks goes from Zermatt over Arolla to Verbier (53km), the smaller course from Arolla to Verbier (25km). The race is done on foot and on skis.