Winter path, grooming depends on snow conditions. Access to Refuge du Christ and Refuge de la Traye. From Les Ravines bus stop walk past the roundabout, walk up to Les Granges, then Mergolaz and La Traie. Allow 4 hrs out-and-back for Mergolaz and 6hrs for La Traie. Wonderful view of the Vanoise massif and Mont-Blanc. Return from Les Allues is possible by bus : walk to le Villard and Les Allues, allow 2hrs