Bottleneck (K2) Bottleneck (K2) The Bottleneck is a location along the South-East Spur, known also as Abruzzi Spur— the most used route to the summit of K2, the second-highest mountain in the world, in the Karakoram, on the border of Pakistan and China. The Bottleneck is a narrow couloir, which is overhung by seracs from the ice field east of the summit. The couloir is located only 400m below the summit, and climbers have to traverse about 100m exposed to the seracs to pass it. Due to the height (8200m) and the steepness (50-60 degrees) this stretch is the most dangerous part
Geography of Gilgit–Baltistan world's highest mountain ranges. The main ranges are the Karakoram and the western Himalayas. The Pamir mountains are to the north and the Hindu Kush lies to the west. Amongst the highest mountains are K2 (Mount Godwin-Austen) and Nanga Parbat, one of the most feared mountains in the world. Many of the highest peaks in Gilgit-Baltistan, such as Baltoro Muztagh, K2 (Mount Godwin-Austen) (8,611 m), the second-highest mountain in the world), the Gasherbrums (7,932 - 8,080 meters, ranked 12-17 in the world), and Masherbrum (7,821 m), 22nd-highest in the world), lie in the Skardu District. Other high peaks are Distaghil