His first taste of high-altitude mountaineering was in 1929 Pasang reached , that was the expedition's high point and they were forced back from there by bad weather. In 1939, Pasang participated in
the expedition to K2 led by
Fritz Wiessner. The two men were not carrying supplemental oxygen, they were very close to reaching the summit when the cautious Pasang asked not to continue climbing as night had fallen. The pair were unable to return for a second attempt. He was awarded a
Tiger Badge by the
Himalayan Club in 1939, his 'Himalayan Club Number' was 139. In 1954, along with
Herbert Tichy and , Pasang made the first ascent of
Cho Oyu. In 1956, Pasang was sirdar for the 1956 Swiss expedition to Everest and
Lhotse, that made the first successful ascent of Lhotse, and the second and third ascents of Everest. Pasang's last expedition was in 1965 when he was recruited by
Mohan Singh Kohli to join a team on a
secretive mission to
Nanda Devi. The mission involved placing a nuclear listening device on the mountain and in order to join the para-military operation he was recruited as a junior officer in the
Indo-Tibetan Border Police. ==References==