We did this trek with Guias del Sur (www.gdspatagonia.com.ar) email: guiasdelsur@hotmail.com.ar
Excellent choice! It is a demanding 12 hours trek: 7 hs to the summit of 1.400 mts thru forest, rock, ice (walking on ice, they provide crampons, piolet, hamlet) and 5 hs back. If you want you can do it in 2 days for a more "relaxed" climb, No...
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