The lake is milky-blue in color, located at an altitude of 2612 m, 26 m deep and can be reached on foot from the lakes Cornisello, in the upper Nambrone valley. At the end of the nineteenth century it was lapped by the front of the Cornisello glacier. The term Vedretta, toponym of pre-Roman origin, is in fact a synonym of glacier.
Lake Vedretta is quite extended and long, 705 m long and 275 m wide. It appears of an intense but turbid blue color, due to the silt of the suspended glacier. It is surrounded by tonalite rocks with obvious signs of glacial modeling. Upstream in the area of the inlet there is a large sandy delta, created by the deposition of glacial silts. In this harsh environment, which appears very hostile to life forms, recent research has discovered tiny organisms. These manage to survive in the interstices between the sediment particles.
Also Lake Vedretta, which appears so remote and apparently far from human activities, was also part of the Val Nambrone lake hydroelectric exploitation project in the 1960s.