| Lac de Vallon | |
|---|---|
| Location | Bellevaux, Haute-Savoie |
| Primary inflows | Brévon |
| Primary outflows | Brévon |
| Basin countries | France |
| Surface area | 15 ha |
| Max. depth | 16 m |
| Surface elevation | 1080 m |
| Frozen | Winter |
Lac de Vallon is a lake at Bellevaux in the Haute-Savoie department of France. The lake formed in 1943 when a landslide blocked the course of the Brévon river.