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 , on the edge of Jura Mountains, 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 in length, wide, covering an area of . 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 .
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