The Tso Kar or Tsho kar is a fluctuating salt lake known for its size and depth situated in the Rupshu Plateau and valley in the southern part of Ladakh in India. It is also recognised as India's 42nd Ramsar site connected by an inlet stream at its south-west end to a small lake, Startsapuk Tso, and together they form the 9 km More plains pool, which is dominated by the peaks of two mountains, Thugje (6050 m) and Gursan (6370 m). Due to the high altitude, the climate is extreme in the winter; temperatures below -40 °C (-40 °F) are not uncommon. In the summer the temperature rises above 30 °C (86 °F), with extreme fluctuations during the day. Precipitation in the form of either rain or snow is extremely rare.