I had no information about the area, and saw a sign post for refugio goriz and senda de los cazadores, so took this route up to the refugio and Monte Perdido, climbed the mountain and came down along the bottom of Ordessa canyon. The first steep km up hill was the most difficult part.
As the info says here, this is a great hike. We did the classic circuit. Up the GR11 to the Cola de Caballo waterfall. The clavijas de Soaso (very short protected section) to the Goriz refuge. Back via Pelay. We met a family with mum and kids in trainers making their way down the Senda de los Cazadores and not enjoying it very much! In 2010 I did the walk UP the Senda de los Cazadores (to do Punta Acuta - a turning off the path before you get to the Faja). It's steep and there were fallen trees and loose terrain. Still, a classic, Yes.