Aconcagua ascent program for 12 days is a shortened version of the classic Aconcagua ascent program. Acclimatization in this program has a much tighter schedule, so the mountain forgives you much less mistakes in tactics and physical preparation. Do not forget about the medical supervision at the base camp, where the doctor is required to check acclimatization degree of members and allows them to go to the mountain or doesn’t allow. Of course, it is possible to abandon the national park responsibility, but in this case you lose the free rangers help in case of emergency. It can be added that, for obvious reasons, this program remains the most popular among all companies conducting Aconcagua ascent. The percentage of climbs is lower than in the three-week program.