the second- highest  mountain on Earth after  Mount Everest . With a peak elevation of 8,611 metres (28,251 ft), K2 is part of the  Karakoram   Range , and is located on the border [2]  between the  Taxkorgan Tajik Autonomous County  of  Xinjiang , China, and  Gilgit , in  Gilgit-Baltistan  of  Pakistan