Salsvatn or Salsvatnet is a lake in the municipalities of Fosnes and Nærøy in Nord-Trøndelag county, Norway. With its deepest depth of 464 metres (1,522 ft), it is Norway’s and Europe’s second deepest lake, after Hornindalsvatnet. Alternate sources give the depth as either 464 metres (1,522 ft) or 482 metres (1,581 ft) at the deepest point. The lake sits very close to the ocean, about 9 metres (30 ft) above sea level at the surface and reaches to a depth of 455 metres (1,493 ft) below sea level.