This stage has a high-mountain character, with equipped passages and magnificent panoramic views: Cirque du Bout du Monde, Pointe Rousse, Lac de la Vogealle, the Dents Blanches, the Pointe de Bostan.
From the Bostan-Tornay refuge, head up the Combe des Verdets towards the Col de Bostan. You cross a mineral landscape, passing Lac de Verdets on your right. At the Col de Bostan, you have 2 options: the Swiss part of the Dents blanches or our French route to the refuge de la Vogealle. At the pass, pass the Golette de l'Oule, then the chain-equipped Pas du Taureau via the Col du Taureau. Take care. Take a right-hand path to the Folly refuge, reach a plateau and follow a grassy ridge down into the Combe de Praz Riant. Go to "la Combe aux Puaires". Leave the Refuge de Folly and head for the Refuge de la Vogealle, via the lake of the same name, following its left bank.