Hiking the Laguna de Los Tres trail was mind-blowing and this view at the top is forever etched in my mind. It took about 10 hours total, with sun, rain and wind accompanying us during the hike. The trail was unmarked in many places so it can be a bit tricky. We did meet a few people luckily whom we were able to ask but there are not many tourists around.
It's steep but not that bad. It was the highlight of my Patagonia trip. To hike this trail, stay over night in the town of El Chalten.