The first sunbeams in the morning are reaching the rocks and peak, the clouds are clearing up.
The grassland region to the northeast of Tro La pass-4864m (or Cho La Pass) is known as Yilhun. Here two rivers, the Tro(Cho)-chu and Dzenu-chu drain from the Trola Range to form the Yi-chu, a fast-flowing tributary of the Nyag chu ཉག་ཆུ་ (Yalong). Here I visited the sacred glacial lake of Yilhun Lha Tso-4110m, situated some 30km below the Tro La pass. This lake is one of the most beautiful in all Tibet བོད. Its shores bedecked with colossal carved mani stones, many of which are the work of a local stone carver named Trador. The mountains and rocks surrounding the lake are said to assume the divine form of the Cakrasamvara mandala to those who have the pure vision to perceive them as such.
Yilhun Lhatso Nature Reserve (190 sq km), extending from the lakeshore as far as the jagged snow peaks of the Trola range to the south, is a natural habitat for176 species of wild animals, including the red deer (cervus albirostris), the snow leopard, the argali, the red fox and various birds of prey. the flora of the reserve include distinctive azaleas, dragon spruce(Picea asperata),cypresses and the snow lotus སྤྱང་དུག་པ changdukpa (Sasssurea laniceps ) .
The Nomads of these upper valleys supplement their income by collecting caterpillar fungus for Chinese medicinal consumption.