Lac des Toules
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Location	Valais
Coordinates	45°55′9″N 7°11′56″E / 45.91917°N 7.19889°E / 45.91917; 7.19889
Type	reservoir
Primary inflows	La Dranse
Primary outflows	La Dranse d'Entremont
Catchment area	37.6 km2 (14.5 sq mi)
Basin countries	Switzerland
Max. length	2.0 km (1.2 mi)
Surface area	0.61 km2 (0.24 sq mi)
Max. depth	75 m (246 ft)
Water volume	20.15 million cubic metres (16,340 acre⋅ft)
Surface elevation	1,810 m (5,940 ft)

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.

• List of lakes of Switzerland
• List of mountain lakes of Switzerland

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