5,806 m or 19,050 ft) is a high mountain pass crossing the Himalayas and the Nepal-Tibet Autonomous Region border a few kilometres west of Cho Oyu and some 30 km (20 mi) northwest of Mount Everest.

From this pass the Mahalangur section of the Himalaya extend east past Cho Oyu, Gyachung Kang, Everest, Ama Dablam and Makalu to the gorge of the Arun River.

[2] The 1952 British Cho Oyu expedition led by Eric Shipton established a base at Lunak below the Nangpa La Pass.

But Ed Hillary, George Lowe and three Sherpas crossed the Nup La col and then went "deep into Chinese territory" like "a couple of naughty schoolboys".

Despite an attempted Chinese coverup, several foreign climbers at base camps on Cho Oyu managed to video and photograph the situation as it unfolded and the events drew widespread international condemnation when shown to the outside world.