Frequently asked questions about climbing Aconcagua (6,962 m / 22,841 ft), the highest mountain in the Andes and in the Western Hemisphere. These answers apply to independent trekkers and guided groups using the Normal Route from the Argentine side near Mendoza.
Yes. Every climber must obtain a permit from Parque Provincial Aconcagua before entering the park. Permits are required for all summit attempts on the Argentine side.
Most climbers allow about two weeks round trip from Mendoza, including travel to base camp and the summit push.
Altitude sickness is common above 4,000 m. Climbers should ascend slowly and watch for headache, nausea, and fatigue.