Cho Oyu is the sixth highest mountain in the world, with a summit elevation of 8,188 meters (26,864 feet) above sea level. It is located on the border of Nepal and Tibet, in the Mahalangur Himalaya range, just west of Mount Everest.

The name "Cho Oyu" means "Turquoise Goddess" in the local language, referring to the striking turquoise color of the mountain's glacial lakes. Cho Oyu is known for its relatively straightforward terrain, with less technical climbing challenges than many of the other 8,000-meter peaks.

The first successful ascent of Cho Oyu was made in 1954 by an Austrian team led by Joseph Jöchler. Since then, the mountain has been climbed by a number of elite mountaineers, including Reinhold Messner and Jerzy Kukuczka.

The area surrounding Cho Oyu is home to a variety of ethnic groups, including the Sherpa people, who have a rich cultural heritage and are renowned for their mountaineering skills. The region is also home to a wide range of flora and fauna, including rare and endangered species such as the snow leopard and the Himalayan black bear.

Cho Oyu is a popular destination for mountaineering, with several routes leading to the summit. The mountain is often climbed by experienced mountaineers as part of a training expedition for Everest or other 8,000-meter peaks.