Lac de l'Abbaye

Lac de l'Abbaye, also known as Lac de Grandvaux or Lac de la Grande Rivière, is a glacial lake in the commune of Grande-Rivière, in the Jura department of France. It is located at an altitude of 879 m, on the edge of Jura Mountains, 7 km south of Saint-Laurent-en-Grandvaux.

The lake owes its name to the abbey of Saint-Claude, which was constructed its banks in the 12th century. Only the reconstructed 19th century church remains.

The lake is 2.1 km in length, 600 m wide, covering an area of 120 ha. There is a small inflow at the northern end, but the lake is mainly fed from precipitation. Water is lost via a sinkhole. The catchment area of the lake is approximately 350 ha.