The best full-day hike in El Chaltén takes you along the Chorrillo del Salto river past the campground at Poincenot -- which is probably the best and most centrally located campground in the area -- and over the Rio Blanco before the final steep climb (400m/1,312 ft., which will take you an hour) up to the gorgeous Laguna de los Tres, nestled beneath the giant granite walls of Mt. FitzRoy.