Hiking up to the refuge. We took it slow, one step at a time, to allow our bodies to acclimate to the altitude. The yellow building in the distance is the refuge, our starting point for the pre-dawn assault on the summit itself.
For the Butterfield Bunch and Friends, Challenge VII: The man in red is Ramiro Prollas, Professor of my Andinismo (mountain climbing) class at the University. This is called a "field trip".