Best time to go: From July to Auguest

Mampang Yumco is located about 20 km southeast of Kangrenboqe at an elevation of 4,585 meters and covers some 400 square km.

The lake derives its water from melting snow in the Kangdese Mountain. With a depth of 90 meters, the lake water is transparent to 14 meters. According to Tibetan Buddhism, the Kuangcai Dragon King Palace lies at the bottom of the lake. In front of the palace is Tsampo Zhaxi, which is a holy tree sending out light as the source of happiness on the earth.

The lake is taken as "the king of holy lakes" with fame as great as the holy mountain of Kangrenboqe. The water of the lake is therefore regarded as dew bestowed from heaven. Drinking it or dipping oneself in it helps build up health, remove annoyance and prolong life. The Tibetans deem all fish or feather they get from the lake or lakeside as gifts from the Dragon King. this is why people who come to take a ritual walk around the holy mountain Kangrenboqe would also walk around the lake. Many tend to prostrate themselves on all fours as they progress, completing one circuit in a week.