Kamba La Pass, at an altitude of 4,794 metres above sea level, is traditionally the divide between ‘front’ and ‘back’ Tibet. At the top there is a splendid panorama with the Yarlung Tsangpo Valley behind (having just climbed from the river) while in front is a superb vista of the stunning scorpion-shaped turquoise lake of Yanzho Yumco. At the pass, you will find the usual prayer flags and ceremonial scarves attached to a pole, yak riding salesmen and a very basic toilet.
Lake Yamzho Yumco is a lake located on the southern Tibetan Plateau (28?‹56?Œ N 90?‹41?Œ E), situated 120 km south of Lhasa, it is over 72 km (45 miles) long. The lake is also known as the Scorpion Lake, due to its unusual shape which can (with a bit of imagination) resemble a scorpion. Other popular names are the Holy Lake or Yamdrok Tso. It is the largest freshwater lake in Tibet
The lake is surrounded by many snow-capped mountains and is fed by numerous small streams. The lake does have an outlet stream at its far western end. Yamzho Yumco has a power station that was completed and dedicated in 1996 near the small village of Pai-Ti at the lake?fs western end. This power station is the largest in Tibet.
The lake is located at an elevation of 4,400 meters above sea level. It covers an area of 800 square kilometres and is 30-40 meters deep. Yamzho means upper pasture and Yum means jade in Tibetan.
The lake's incredible blue hue is a result of its oligotrophic nature, which means that the water has a high mineral content and a low nutrient content.