Gasherbrum I, also known as Hidden Peak, is the 11th highest mountain in the world, with a summit elevation of 8,080 meters (26,510 feet) above sea level. It is located in the Karakoram range of the Himalayas on the border between Pakistan and China.

The name Gasherbrum is derived from the Balti language, which is spoken in the region, and means "beautiful mountain". The mountain is also known as Hidden Peak because it is obscured by other peaks from most angles.

The first successful ascent of Gasherbrum I was made in 1958 by an American expedition led by Nicholas Clinch and Pete Schoening. Since then, the mountain has been climbed by several expeditions, but it remains a challenging and technical climb that requires high-altitude mountaineering skills.

The Gasherbrum massif, which includes Gasherbrum I and several other peaks, is known for its dramatic and imposing peaks, including the towering south face of Gasherbrum I. The area surrounding the mountain is home to several ethnic groups, including the Balti people, who have a rich cultural heritage and a long history of mountaineering.

Gasherbrum I is a popular destination for high-altitude mountaineering, with several routes leading to the summit. The most common route is the Normal Route, which follows the west ridge of the mountain, but there are several other technical and challenging routes for experienced mountaineers.