Mur de la Serpentine
It is somewhat under the summit of well known Pigne d'Arolla (3790 m.) This glacier slope gives way to the ice plateau (left), the Col du Brenay at 3635 m., just under the summit (not visible here)
From here, it seems easy. But, it was not. We choosed to make the Pigne d'Arolla in one day (ski) and as roundtour from Arolla, through the ladders of the Pas de Chèvres and then from the rear, through th Tséna Refien glacier and the Mur de la Serpentine (Back through Vignettes refuge and Glacier de Pièce) which is a great enterprise. Even there were no clouds and during April, we were just after the passage of a cold front. Under the summit, we had minus 20°C and winds around 100 km/h, to be knocked down !