Oisans - Ski de sixième degré (1975)
In 1975, Patrick Vallençant skied in some very challenging couloirs in the Oisans region: the north couloir of the Col du Diable, the north couloir of the Coup de Sabre, the couloir of the Pic sans Nom, the Barre Noire couloir in the Écrins massif, and the Gravelotte couloir on the Meije. He was acc