Les Périades
Les Périades (highest point: ) is a sharp and heavily-pinnacled mountain ridge, stretching for over in the Mont Blanc massif in Haute-Savoie, France. It runs in a southerly direction from the Col du Tacul to the Col du Mont Mallet. Its highest point is Pointe Cupelin () Principal points along th crest of Les Périades, from south to north: Les Périades are divided into three parts by the Brèche Puiseux (or Brèche Supérieure des Périades) and by the Brèche des Périades. A bivouac hut (known as the "Bivouac Paul Chevalier alle Périades") was installed near Pointe de Sisyphe  in 1928 at a height of . It eventually became the property of the French Alpine Club, and was renovated in 1996. The site collapsed in 2019 during the summer heatwave which caused previously frozen ground to become unstable. It was replaced in 2020, following a public fund-raising campaign, and can accommodate three or four people.: