Lac des Toules is a reservoir in Valais, Switzerland, at Bourg-Saint-Pierre.

Its surface area is 0.61 km2 (0.24 sq mi).

It has a €2.2 million floating solar plant that was flown in by helicopter in 2019, and delivers 800 MWh/year.

[1] The dam Les Toules was completed in 1963.

This article related to a lake in Valais is a stub.