Lake Derborence

Lac de Derborence
View from the west side
Location	Conthey, Valais
Coordinates	46°16′44″N 7°13′2″E / 46.27889°N 7.21722°E / 46.27889; 7.21722Coordinates: 46°16′44″N 7°13′2″E / 46.27889°N 7.21722°E / 46.27889; 7.21722
Primary inflows	Derbonne
Basin countries	Switzerland
Surface area	4.4 ha (11 acres)
Surface elevation	1,449 m (4,754 ft)

Lac de Derborence is a mountain lake in the municipality of Conthey, Valais, Switzerland, located near the hamlet of Derborence. It was formed after rockfalls on 24 September 1714 and 23 June 1749. In 1749, an estimated 50 million m³ of rocks blocked the course of the Derbonne river and led to the formation of the lake.