Gosaikunda, also spelled Gosainkunda, is an alpine freshwater oligotrophic lake in Nepal's Langtang National Park, located at an elevation of 4,380 m in the Rasuwa District with a surface area of 13.8 ha. Together with associated lakes, the Gosaikunda Lake complex is 1,030 ha in size and was designated a Ramsar site on 29 September 2007.