2 days hike to Volcano El Misti in Perú. 5.822 according to Wikipedia 5.815 (my gps). Drove from Arequipa few km from the mountain. Arequipa is in 2.335 m and second largest city in Perú with population of 840.000. I rank it as very difficult because you need altitude adjustment but not very technical. I had the impression before that there where good path all the way to the top, but it is not and often hard rock and loose sand.