Charles Snead Houston was an American physician, mountaineer, high-altitude investigator, inventor, author, film-maker, and former Peace Corps administrator. He made two important and celebrated attempts to climb the mountain K2 in the Karakoram Range.

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-administered Kashmir and partially in the China-administered Trans-Karakoram Tract in the Taxkorgan Tajik Autonomous County of Xinjiang.