The document describes several important mountain ranges located in Pakistan. The Karakoram Range is the second highest in the world and contains K2, the second highest peak. It is also home to the Siachen and Biafo Glaciers, the second and third largest glaciers. The Himalayan Range contains Nanga Parbat, the ninth highest peak and the Hindu Kush Range contains Tirich Mir, its highest peak. These mountain ranges play a key role in Pakistan's climate and geography.