Bjimilangtsho, at an altitude of about 4,000 metres is located about four hour’s hike from Tshaluna in Thimphu. It is midway to Druk Path, one of the best treks in Bhutan that leads trekkers through ancient trading route with spectacular views of rhododendron forests, alpine yak pastures and stunning lakes stocked with snowy mountain trouts. Bjimilangtsho, which spans more than a km is known for giant trout, which were introduced in the 1970s.
According to oral history, a young woman from Tshaluna in Thimphu was herding her cattle in the area. In the past, the place was Tshalups’ popular grazing land. Many took their cattle in the area to graze. One fateful evening, she lost an ox from the herd. Upon reaching home, she was scolded by her family and was sent back to look for the missing beast. When she reached the grazing land, she found the ox sleeping in the current location of the lake. Since it was deep into the night, the girl also spent the night in the place. In the morning, it is said that the ox turned into a lake and the young girl turned into the tshomem (mermaid) of the lake.
Information source: Choki Wangmo, Kuensel.