Gokyo Lakes are located in the
Khumjung Village Development Committee of
Solukhumbu District in the
Sagarmatha Zone in north-eastern
Nepal. Gokyo Cho, also called Dudh Pokhari, is the main lake with an area of , and the village of
Gokyo lies on its eastern shore. Thonak Cho is the largest lake with an area of . Gyazumpa Cho is in size, followed by Tanjung Cho with an area of , and Ngojumba Cho with an area of . As sources of permanent fresh water they have high
hydrological value. They feed on waters from various sources, such as seepage from the
Ngozumpa glacier, a stream coming from the Renjo La pass from the north-west and another stream originating from the Ngozumpa glacier in the east. These are glacier-fed freshwater wetlands and discharge water to the Dudh Kosi headway via Taujon Lake and Longabanga Lake. These lakes are deeper than previously assumed by the researchers. Fourth Lake (Thonak Cho) is the deepest lake (62.4 m) followed by Gokyo Lake which is 43 m. A direct connection between the Gokyo Lake and the upper Thonak Cho and the Ngozumpa Cho has not been observed, but these lakes may be connected via underground seepage water. The Gokyo Lake system is naturally vulnerable, as it lies in an ecologically fragile and unstable zone. The outburst of the Ngozumpa glacier is always a threat to the existence of the lakes. The Gokyo lake system of 19 lakes is spread over an area of lying between . The wetland lies at the head of the
Dudh Kosi, which descends from
Cho Oyu. == Religious significance ==