What you're looking at is actually 2 mountains, in the foreground is Milluni Peak, which is separated from Huayna Potosi. In the background, it is Huayna Potosi but the South/East Face. The main route up this face is called the French route.
Anyway, it is a great photo.
"Those who dream by night in the dusty recesses of their minds wake in the day to find that all was vanity; but the dreamers of the day are dangerous men, for they may act their dream with open eyes, and make it possible. This I did."
--T E Lawrence.