K2, at 8,611 metres (28,251 ft) above sea level, is the second-highest mountain on Earth, after Mount Everest at 8,849 metres (29,032 ft). It lies in the Karakoram range, partially in the Gilgit-Baltistan region of Pakistan 展开

The mountains of K2 and Broad Peak, and the area westward to the lower reaches of Sarpo Laggo glacier, consist of metamorphic rocks, known as the K2 Gneiss and part of the … 展开

K2 features several routes, each with distinct characteristics; however, they all share common challenges. The first is the extreme altitude, which results in a significant reduction in available oxygen. At the summit of K2, only one-third of the oxygen present at sea … 展开

The name K2 is derived from the notation used by the Great Trigonometrical Survey of British India. Thomas Montgomerie made the first survey of the Karakoram from Mount … 展开

K2's height given on maps and encyclopedias is 8,611 metres (28,251 ft). In the summer of 2014, a Pakistani-Italian expedition to K2, named … 展开

Early attempts
The mountain was first surveyed by a British team in 1856. Team member Thomas Montgomerie designated the mountain "K2" for being … 展开

• K2 (1991), an adventure drama film adaption of Patrick Meyers' original stage play, directed by Franc Roddam and loosely based on the story of Jim Wickwire and Louis Reichardt, the first Americans to summit K2
• Vertical Limit (2000), … 展开