The national park, created in 1937, is the second largest in Argentina. Its name refers to the giant ice cap in the Andes range that feeds 47 large glaciers, of which only 13 flow towards the Atlantic Ocean. The ice cap is the largest outside of Antarctica and Greenland. In other parts of the world, glaciers start at a height of at least 2,500 meters above mean sea level, but due to the size of the ice cap, these glaciers begin at only 1,500m, sliding down to 200m AMSL, eroding the surface of the mountains that support them.
Monte Fitz Roy (also known as Cerro Chaltén, Cerro Fitz Roy, or simply Mount Fitz Roy) is a mountain located near El Chaltén village, in the Southern Patagonian Ice Field in Patagonia, on the border between Argentina and Chile. First climbed in 1952 by French alpinists Lionel Terray and Guido Magnone, it remains among the most technically challenging mountains on Earth for mountaineers. Monte Fitz Roy is the basis for the Patagonia clothing logo following Yvon Chouinard's ascent and subsequent film in 1968.