From the top of the Grands Montets start down Les Rognons as described under the freeride lines. Ski out and across the Glacier d’Argentière, crossing to the far side and locating the best point in the moraine wall to pass through. Skin up the large south-west facing bowl above and then bootpack up the couloir south of the Col du Passon to reach the Col itself (as described for the first day of the Haute Route). Crampons are sometimes needed to boot up the couloir which can often have firm re-frozen snow.

From the col ski down trending north-west on pleasant, rolling glacial slopes. Keep to the left of the rock spur at 2700 meters altitude and continue down a steeper bowl. From here you can continue to ski the fall line directly back into Le Tour staying to the left of the waterfalls and rock slabs. If snow cover isn’t so good lower down or there are doubts about the snow stability, it is recommended to stay skiers left and follow the summer trail down into the start of the tree line and back into the village of Le Tour. It is also possible to take a variation at 2300 meters altitude across to the Bec de la Cluy giving access to some beautiful freeride terrain and short 40 degree couloirs.