'Beautiful Mountain - 1'; Urdu: گاشر برم - ۱; simplified Chinese: 加舒尔布鲁木I峰; traditional Chinese: 加舒爾布魯木I峰; pinyin: Jiāshūěrbùlǔmù I Fēng), 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.

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."

Montgomerie in 1856 when he first spotted the peaks of the Karakoram from more than 200 km away during the Great Trigonometric Survey of India.

In 1892, William Martin Conway provided the alternate name, Hidden Peak, in reference to its extreme remoteness.

Gasherbrum I was first climbed on July 5, 1958, by Pete Schoening and Andy Kauffman of an eight-man American expedition led by Nicholas B. Clinch, Richard K. Irvin, Tom Nevison, Tom McCormack, Bob Swift and Gil Roberts were also members of the team.