Concordia (Karakoram) altitude, water should be obtained from clear water sources and brought to a rolling boil, or purified before consumption. In 1890, Robert Lerco was the first reported person to reach Concordia, followed by William Martin Conway in 1892. Notable peaks in this area include: Concordia (Karakoram) Concordia () is the name for the confluence of the mighty Baltoro Glacier and the Godwin-Austen Glacier, in the heart of the Karakoram range of Pakistan. It is located in Baltistan region of Pakistan. The name was applied by the English mountaineer Aleister Crowley during the 1902 Eckenstein/Crowley attempt on K2 (see Confessions of
K2 incorrectly showing that K2 was taller than Mount Everest, and therefore the tallest mountain in the world. A corrected measurement was made in 1987, but by that point the claim that K2 was the tallest mountain in the world had already made it into many news reports and reference works. The mountains of K2 and Broad Peak, and the area westward to the lower reaches of Sarpo Laggo glacier consist of metamorphic rocks, known as the "K2 Gneiss" and part of the Karakoram Metamorphic Complex. The K2 Gneiss consists of a mixture of orthogneiss and biotite-rich paragneiss. On the south