The fifth day is the longest walk of the tour, about 10 hours through all sorts of terrain, so starting at the uchuy hacienda going down a little to about 4000m, and then slowly going up to the Qampa pass (5000 m), and then down again to the Azul cocha at about 4500m.
The landscape is really great, the valleys are quite broad and parts of the path are really easy and beautiful.