evidence: Mount Fitz Roy hike is one of the most beautiful hikes in Patagonia, Argentina. Its beauty rivals the Las Torres hike in Torres del Paine. This Fitz Roy hiking guide tells you everything you need to know about this hiking trail in Los Glaciares National Park. You may not recognize Mt. Fitz Roy by its name, but you must have heard of the clothing brand Patagonia. The Patagonia logo is actually an outline of the Fitz Roy mountain in Patagonia, Argentina. Mt. Fitz Roy is the tallest mountain in the Argentine Patagonia, boarding Chile and Argentina near the town of El Chalten and it’s one of the most technically difficult for mountaineering.