From the Bellevue cable car, skin along the Tramway du Mont Blanc railway tracks heading west and passing under Mont Lachat. Skin up a steep bowl, leaving the line of the railway and passing through a rock band to the left. From here there is a steep and exposed boot pack to gain flatter ground above just to the east of a small hut. Skin across what remains of the small Glacier de la Griaz and locate the entrance to the couloir at 3000 meters elevation.

Ski this magnificent couloir fall line until it is possible to trend left at the bottom and out towards the summer trail. Head into the dense forest staying above and to the west of the Bourgeat stream. Pick your way down some tight trees, eventually locating the 4x4 track leading back into Les Houches. If there is good snow cover on the opposite side of the Bourgeat stream, it is also possible to follow the summer trail on is west facing flank back down into Les Houches.