France, Haute-Savoie (74), Massif du Chablais, Montagnes du Giffre, Sixt-Fer-à-Cheval, Sixt-Fer-à-Cheval nature reserve, hikers walking between the Col de Sageroux and the Tête de Pérua (2296m), with the Pointe Rousse des Chambres (2660m) in the background