Cerro Chaltén, also known as Cerro Fitz Roy or Monte Fitz Roy, is a mountain ('cerro') located near the El Chaltén village, in the Southern Patagonian Ice Field, on the border between Argentina and Chile. It has been agreed by the two countries that the international border detours eastwards to pass over the main summit, but a large part of the border to the south of the summit remains undefined.
Although the highest peak in the Los Glaciares park, it is less than half the height of the Himalayan giants. Despite this, the mountain has a reputation of being "ultimate" because the sheer granite faces present long stretches of arduous technical climbing. In addition, the weather in the area is exceptionally inclement and treacherous. It attracts many photographers thanks to its otherworldly shape.