K2

K2 is the second-highest mountain on Earth, standing at 8,611 meters above sea level.

It is located in the northwestern Karakoram Range. This massive peak sits on the border between two regions. Part of the mountain is in the Gilgit-Baltistan region of Pakistan-administered Kashmir. The other part lies in the Taxkorgan Tajik Autonomous County of Xinjiang, China.

It is the most prominent peak within the Karakoram. This means it has a very high degree of independence from nearby mountains. It is part of a massive area of uplift. This geological system includes the Tibetan Plateau and the Himalayas.

The mountain has a very distinct, steep shape. It looks like a consistent pyramid that drops quickly in almost every direction. The north side is the steepest face of the mountain. There, it rises over 3,000 meters from the K2 (Qogir) Glacier. This rise happens over only 5 kilometers of horizontal distance. In most other directions, the mountain achieves massive vertical relief very quickly. This extreme steepness makes K2 much more difficult to climb than Mount Everest. The mountain's northern location also brings more frequent inclement weather.

The geology of K2 is composed of very old metamorphic rocks. These rocks are known as K2 Gneiss. This rock is part of the Karakoram Metamorphic Complex. The Gneiss is a mixture of orthogneiss and biotite-rich paragneiss. These rocks were formed between 115 and 120 million years ago. Long ago, large bodies of magma formed in a subduction zone. This is where one tectonic plate slides under another. This magma eventually became a granitic precursor. During the Eocene Period, the collision of the Asia and Indian plates buried these rocks deep underground. The intense pressure and heat transformed them into the gneiss we see today.

K2's name comes from the Great Trigonometrical Survey of British India. In 1856, Thomas Montgomerie performed the first survey of the Karakoram. He sketched the most prominent peaks and labeled them K1 and K2. The "K" stands for the Karakoram range. While K1 was known locally as Masherbrum, K2 did not have a common local name. This might be because the mountain is so remote. It is not visible from Askole, one of the highest nearby settlements. It is only briefly seen from the end of the Baltoro Glacier. Some suggest the name Chogori, meaning "big mountain" in Balti. However, evidence for this name is scant.

Climbing K2 is a legendary and dangerous challenge. It is often called "The Savage Mountain." This nickname came from climber George Bell in 1953. He said the mountain tries to kill you. It is also known as "The Mountaineers' Mountain." The first successful summit occurred in 1954. Italian climbers Lino Lacedelli and Achille Compagnoni reached the top. They were part of an expedition led by Ardito Desio.

Most people attempt the climb during July or August. These are typically the warmest months of the year. In January 2021, a team of Nepalese climbers led by Nirmal Purja and Mingma Gyalje Sherpa reached the summit in winter. This made K2 the final eight-thousander to be climbed in winter.

K2 is known for being one of the deadliest mountains in the world. Before 2021, roughly one person died for every four people who reached the summit. Since then, about 800 people have reached the top. However, 96 people have died during attempted climbs. The mountain's faces are very exposed and dangerous. The eastern face remains unclimbed by anyone. This is partly due to unstable ice and snow formations. These hazards make the eastern side extremely difficult to navigate.

The mountain's environment is vital to the region. Glaciers near K2, such as those to the south and east, provide meltwater. This water flows into the valleys to support agriculture. It is a major part of the regional fresh-water supply. K2 stands over 4,000 meters above the glacial valley bottoms at its base. This massive height and local relief make it a unique landmark. It remains a symbol of the power and difficulty of high-altitude climbing.