The Rochers de Gagnerie (2,735 m) are a mountain of the Chablais Alps, overlooking the Lac de Salanfe in the canton of Valais. They lie in the massif of the Dents du Midi, forming a huge wall at the end of the Saint Barthélemy valley, south-west of Mex.The mountain includes several secondary summits, among which the sharp needle of La Vierge (2,641 m).