Chau Chau Kang Nilda also known as 'Guan Nelda' or 'blue moon in the sky' [4] is a mountain in the western Himalayas.

It lies in the northern Indian state of Himachal Pradesh.

The mountain located 13 km northeast of Kaza, the main town in Spiti, in the district of Lahaul and Spiti district.

Roberts (James Owen Roberts Merion) who crossed Spiti from Kullu.

[5] The second ascent was made in 1955 by Trevor Braham and Peter Holmes, a young Cambridge University graduate, who went on to become the Chairman of Shell.