Gasherbrum I, originally surveyed as K5, and also known as Hidden Peak, is the 11th highest mountain in the world at 8,080 metres (26,510 ft) above sea level. It is located between Shigar District in the Gilgit–Baltistan region of Pakistan and Tashkurgan in the Xinjiang province of China. Gasherbrum I is part of the Gasherbrum Massif, located in the Karakoram region of the Himalaya.
Gasherbrum is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of the neighboring peak Gasherbrum IV; but in fact, it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain".
Gasherbrum I was designated K5 (meaning the 5th peak of the Karakoram) by T.G.