Rara lake is the biggest and deepest fresh lake in Nepal located in Mugu and Jumla districts. It is the main feature of Rara national park.Rara Lake lies at an altitude of 2,990 m above sea level,has a water surface of 10.8 sq km(4.2 sq mi), a maximum depth of 167 m (548 ft), is 5.1 km (3.2 mi) long and 2.7 km (1.7 mi) wide.
Rara Lake, being surrounded by Rara National Park, has unique floral and faunal importance with rare and vulnerable species. The park was established in 1976 to preserve the beauty of the lake and protect it from sedimentation and adverse human activities. The Park flora consists of 1074 species, of which 16 are endemic to Nepal; the fauna includes 51 species of mammals and 214 species of birds.
Rara lake has been a popular destination with a very rough route in Western Nepal for trekkers. The glimpses of culture and scenery on the way is quite different from the rest of Nepal. Situated in high altitude, you can find the lake surrounded by Rara National Park with pine, spruce and juniper forest. The view of snow-capped Himalayan peaks enhance the attraction of trekkers. The trek begins with flight to Jumla (over an hour flight from Kathmandu or from nearer Nepalgunj . Going along the mountain path and some villages one can reach the bank of Rara lake.