Skin up the Périades Glacier towards the Col du Tacul until you reach the steeper slopes below the Col du Tacul. Start climbing up the couloir that leads to the Col du Tacul (Capucin Couloir). Instead of continuing up this couloir, trend climber's right and across some easy mixed ground (there may be a small rock step to scramble over). Continue up and slightly rightwards until you the col (Brêche du Tacul). Take in the breath taking views of the Grand Jorasses before dropping into the east facing couloir below. There are two possible entrances, neither of which normally requires an abseil. Ski down the couloir which widens before joining the Mont Mallet Glacier. Continue down this glacier, taking care to avoid large crevasses which usually appear on skier's right side of the fall line. Join the Leschaux glacier and continue to the Mer de Glace and down the final section of the Vallée Blanche.