Gosaikunda, also spelled Gosainkunda is an alpine freshwater oligotrophic lake in Nepal's Langtang National Park, located at an altitude of 4,380 m (14,370 ft) in the Rasuwa District with a surface of 13.8 ha (34 acres). Together with associated lakes, the Gosaikunda Lake complex is 1,030 ha (4.0 sq mi) in size and has been designated a Ramsar site in September 2007. The lake melts and sips down to form the Trishuli River and remains frozen for six months in winter October to June. There are 108 lakes in this area, small to medium in size. The challenging Lauribina La pass at an altitude of 4,610 m (15,120 ft) is on its outskirts.