Aconcagua is the highest mountain outside of the Himalayas.  Located in Southern Argentina it is also the highest mountain in the Southern and Western hemispheres.  The Vacas Valley route starts in the North East and offers a traverse of the mountain, descending via the ‘normal’ or Horcones Valley route.  This 23 day itinerary allows plenty of time for acclimatization and offers a 3 day summit window.