Rara Lake (Rara taal) is the biggest and the deepest lake of Nepal. It lies in Rara Village Development Committee, Mugu District, Karnali Zone in Western Nepal and falls under the Rara National Park. The lake is also known as Mahendra Daha, named after the late king (Mahendra of Nepal). Rara Lake lies at an altitude about 2,990 metres (9,810 ft) above the sea level covering an area of 10.8 km2 (4.2 sq mi). The lake having a length of 5 kilometres (3.1 mi) and a width of 3 kilometres (1.9 mi) has a maximum depth of 167 metres (548 ft). It flows into the Mugu Karnali river via the Nijar river (Nijar Khola). The water quality is characterized by high pH, conductivity and total hardness. The lake was reported to be very slightly polluted and was classified as oligotrophic in limnological terms.
