| Lac de Cap-de-Long | |
| Location: | Hautes-Pyrénées |
| Coords: | 42.825°N 0.1297°W |
| Type: | reservoir |
| Outflow: | Neste de Couplan |
| Pushpin Map: | Pyrenees |
| Basin Countries: | France |
| Area: | 1.1km2 |
| Max-Depth: | 130m (430feet) |
| Elevation: | 2161m (7,090feet) |
Lac de Cap-de-Long is a lake in Hautes-Pyrénées, France. At an elevation of 2161 m, its surface area is 1.1 km².