The Grande Casse (3,855 m) is the highest mountain of the Vanoise Massif in the Graian Alps in the region of Savoie, France. It is located in the heart of the Vanoise National Park, near the village of Pralognan-la-Vanoise, which is about 25 km southeast of the nearest town, Moûtiers. It has a steep 600 m high north face. The other sides of the mountain are more gentle, mostly consisting of broken rocks. A high ridge connects it to the nearby peak of Grande Motte.