From El Calafate I took a bus to El Chalten. Unfortunately the weather turned bad, but I did have one clear day that I used to hike part of the Laguna de los Tres trail to see Mt. Fitz Roy. The next day I did a mini-tour to Lago del Desierto, but the weather was just too bad. For text go here: http://mytimetotravel.wordpress.com/2012/11/19/must-exercise-must-exercise/