Dôme de la Sache, Mountain summit in Massif de la Vanoise, France.

Dôme de la Sache is a 3,601-metre summit in the northern part of the Vanoise massif, in Savoie, France. It lies at the southern end of the ridge that runs from Mont Pourri. Its southern slope falls within the Tignes-Champagny national nature reserve.

Dôme de la Sache lies in the northern part of the Vanoise massif, on the southern extension of the ridge that starts at Mont Pourri, in Savoie. Its southern slope falls within the Réserve naturelle nationale de Tignes-Champagny. The sources record no first ascent or survey date for the summit.

The summit lies on the southern extension of the ridge that runs from Mont Pourri, and its south face falls within the Réserve naturelle nationale de Tignes-Champagny. The name Sache refers to the mountain itself, and the peak appears in French alpine climbing records as a 3,601-metre summit of the northern Vanoise.

Reaching the summit requires advanced mountaineering abilities and proper equipment for glacier travel throughout all seasons. Good physical training and experience in alpine conditions are necessary to attempt this challenging route safely.

The summit's southern slope lies within the Réserve naturelle nationale de Tignes-Champagny, while the peak itself stands outside the Vanoise National Park core. It rises at the southern end of the ridge that runs from Mont Pourri, in the northern part of the Vanoise massif.