Tsomgo Lake, also known as Tsongmo Lake or Changgu Lake, is a glacial lake in the East Sikkim district of the Indian state of Sikkim, some 40 kilometres (25 mi) from the capital Gangtok. Located at an elevation of 3,753 m (12,313 ft), the lake remains frozen during the winter season. The lake surface reflects different colours with change of seasons and is held in great reverence by the local Sikkimese people. Buddhist monks prognosticated after studying the changing colours of the lake.
LocationEast SikkimCoordinates27°22′31″N 88°45′50″EBasin countriesIndiaMax. length836 metres (2,743 ft)Max. width427 metres (1,401 ft)Surface area24.47 hectares (60.5 acres)Average depth4.58 metres (15.0 ft) (average)Max. depth15 metres (49 ft)Surface elevation3,753 metres (12,313 ft)Frozenwinter