Run over 3000m with pure oxygen. Your calves will find the mountain on a course of schist and rock, without a single fir tree. This is a gateway to high-altitude trail running, even for beginners. The usual chic resort atmosphere gives way to the sweetness of an authentic and friendly village. You'll traverse the mythical Col de l'Iseran, the highest road pass in the Alps, before entering the surprising 'tunnel des 3000'. Simplicity and self-transcendence define this experience in the heart of nature.