Go to the top of grand montent. Look to the wide open field to the right when walking down and ski along it (not the north face of GM). Same start as Pas de chevre. The wide field to skiers right (after skiing a while) is Pas De chevre. You go skiers left of pas de chevre but not to far.
Classic colouir and you will understand the name when you are there. 1000 vertical drop in amazing surrroundings. Steep and narrow in the beginning but bit wider further down. After it ends you come to a glacier and find your way to mere de glace and the train back to cham.