| Mattmark dam | |
|---|---|
| Location | Saas Valley, Valais |
| Coordinates | 46°2′17″N 7°57′36″E / 46.03806°N 7.96000°ECoordinates: 46°2′17″N 7°57′36″E / 46.03806°N 7.96000°E |
| Type | reservoir |
| Catchment area | 37.10 km2 (14.32 sq mi) |
| Basin countries | Switzerland |
| Max. length | 3.2 km (2.0 mi) |
| Surface area | 1.76 km2 (0.68 sq mi) |
| Max. depth | 93 m (305 ft) |
| Water volume | 10.5 million cubic metres (8,500 acre·ft) |
| Surface elevation | 2,197 m (7,208 ft) |
Mattmark dam is a reservoir in the Saas Valley of the Canton of Valais, Switzerland. The Mattmark dam was built from 1960-1965. The lake's surface area is 1.76 km2 (0.68 sq mi).
The lake lies at a height of 2,197 metres above sea level, between the massifs of the Rimpfischhorn and Stellihorn. The highest peak visible from the lake is the Strahlhorn (4,190 m).