This magnificent straight Patou couloir overlooks Lake Puy Vachier. The access is by the Pacave valley, the most beautiful and the least frequented of the various freeriding / free-skiing lines of the Vallons de Chancel, steep and regularly in good snow. Take care, there is avalanche risk (wind slab due to strong wind from the southwest, west ...). A short traverse above the cliffs overlooking the lake leads to the entrance of the couloir. This entrance can be very narrow for a few metres. (…)