The Dents du Midi (French: teeth of the south) are a multi-summited mountain situated in the Chablais Alps in the Swiss canton of Valais. They are composed of seven distinct summits and reach a height of 3257 metres (10,686 feet). Highest mountain between Lake Geneva and the Mont Blanc Massif, they dominate the Val-d'Illiez and the Rhône Valley, from Martigny down to the lake. Together with the slightly lower Tour Sallière, they form a cirque around the Lac de Salanfe, an artificial reservoir. Geologically it makes up a part of the massif Haut-Giffre.