Winter mountaineering in France, near Grenoble. Gully Paul Arthaud (or Gully Zia) then we wanted to continue with the crossing of the N-S ridges of the Oreille du Loup. We learned good lessons from this first experience which, despite the conditions, was carried out without major risks. It was a very good course to start winter mountaineering because it did not require a high technical level and there were multiple escape routes (so low commitment).