Adventure Alan:
… you’ll see far fewer people on the Cerro Castillo Trek than hikes of similar beauty and stature in other areas of Patagonia — like the Torres del Paine Trek, or the Fitz Roy Trek in Argentina’s Los Glaciares National Park. As such, the Cerro Castillo Trek is a fabulous place for adventurers looking for the trail less traveled …
Duration – 3 to 4 Days. Moderately fit hikers can easily do this in 3 days.
Distance – 34 miles (54 km) classic route [with a shorter option for 25 miles (40 km)]
Level of Difficulty – Moderate
Best Time of Year – December to March, Austral summer
besthike.com 