Cho Oyu, mountain, one of the world’s highest (26,906 feet [8,201 m]), in the Himalayas on the Nepalese–Tibetan (Chinese) border about 20 miles (30 km) northwest of Mt. Everest. The Nangpa La, a glacier saddle (pass) 19,050 feet high lying south of the peak, forms part of the trade route between Tibet and the valley of Khumbu. Glaciers and a bitter climate delayed the climbing of Cho Oyu until Oct. 19, 1954, when the summit was reached by an Austrian party including Herbert Tichy, Sepp Jöchler, and Pasang Dawa Lama, a Sherpa.