| Grand Lac de Laffrey | |
|---|---|
| Location | Isère |
| Primary outflows | Laffrey |
| Basin countries | France |
| Max. length | 3 km |
| Max. width | 0.5 km |
| Surface area | 120 ha |
| Average depth | 39 m |
| Surface elevation | 911 m |
The Grand lac de Laffrey (Great Laffrey lake) is one of the Laffrey lakes, located in Matheysine at 23 km south of Grenoble, in the Isère département.