as part of a three-day ascent of Mont Blanc involves climbing up the south ridge of the Aiguille de Bionnassay from the Col de Miage, then descending from the summit down its razor-sharp, icy, and often corniced east (frontier) ridge. From there the route climbs again up the west ridge of the Dome du Gouter, past the Vallot Hut, to reach the Bosses ridge and thence to the summit of Mont Blanc. The route has been described as 'a truly magical expedition of ice and snow aretes at great altitude'. The Durier Hut on the Col de Miage can either be reached directly from the village of Tresse via an increasingly broken slope of scree in its upper reaches, or via a traverse from the Conscrits Hut over the Dômes de Miage. Image gallery See also List of 4000 metre peaks of the Alps References External links Aiguille de Bionnassay on French IGN map portal Entry on SummitPost.org Entry on CampToCamp.org Entry on UkClimbing.com Entry on Die Viertausender der Alpen Video: Traverse of Aiguille de Bionnassay to Mont Blanc with views of the sharp east ridge. Video: Extreme ski-descent of N face of Aiguille de Bionnassay. Alpine four-thousanders Mountains of the Alps Mountains of Haute-Savoie Mont Blanc massif