The massif had long been considered a sacred mountain and a place of pilgrimage, when before the Communist 'liberation' up to 10,000 Golok people would make the 120-mile circumambulation of the mountain each year. The first European to describe the mountain was the British explorer Brigadier-General George Pereira on his expedition on foot from Peking to Lhasa of 1921-2, sometimes reckoned one of the great geographical discoveries of the twentieth century. Pereira, who saw Amne Machin from about 70 miles away, thought its "height must be at least 25,000 feet m, and might be anything; it dwarfed all other mountains near it."