Here too, we see a significant retreat of the front of the Glacier de la Grande Casse. At the threshold of the Ouille, you can admire the imposing lateral moraines that testify to the past presence of the glacier. These are rocky mounds of various sizes, carried along by the ice on the sides of the glacier. The glacier, in turn, occupies only the upstream part of the valley and forms a cirque between the Pointe de la Petite Glière and the Aiguille de l’Épéna, at the foot of the Col de la Grande Casse.