The reservoir lies at a height of 1,606 metres above sea level and is surrounded by peaks of over 3,000 metres. The highest is Piz Terri (3,149 m), on the north-east side of the lake, followed by the Plattenberg (3,041 m), on the east side. The Torrone di Nav (2,832 m) overlooks the lake from the south side, while Pizzo Pianca (2,377 m) overlooks the lake from the north side.