Detailed planning notes for climbing Aconcagua (6,962 m / 22,841 ft) via the Normal Route from Argentina. This guide covers permits, acclimatization schedules, base-camp logistics, and summit-day decisions for Andes mountaineering teams.
Yes. Every climber must obtain a permit from Parque Provincial Aconcagua before entering the park. Apply in Mendoza with a valid passport, proof of rescue insurance, and a signed medical form. Permit fees vary by season and nationality; guided groups often bundle permit processing with their expedition fee.
Carry a printed permit copy at Confluencia (3,390 m) and Plaza de Mulas (4,350 m). Rangers check documents at park gates and base camps.
Most climbers allow eighteen to twenty-one days round trip from Mendoza. A standard acclimatization itinerary includes two nights at Confluencia, four to five nights at Plaza de Mulas, and rotation nights at Camp Canadá (5,050 m) and Camp Colera (5,970 m) before a summit window.
Build at least two full rest days at Plaza de Mulas before moving above 5,000 m. Rushing the schedule increases withdrawal rates from altitude illness.
Altitude sickness is common above 4,000 m on Aconcagua. Symptoms include persistent headache, nausea, loss of appetite, and disturbed sleep. Use a staged ascent: climb high during the day, sleep low at Confluencia or Plaza de Mulas, and never ascend more than 500 m of sleeping elevation per day once above 4,300 m.
Carry acetazolamide only under medical advice, monitor oxygen saturation twice daily, and descend immediately if symptoms worsen at rest. High-altitude pulmonary edema (HAPE) and cerebral edema (HACE) are medical emergencies requiring evacuation to Mendoza.
Summit-day temperatures on the Normal Route often drop below −20°C with strong winds. Pack insulated mountaineering boots rated for −40°C, crampons, an ice axe, a four-season down suit or layered shell system, glacier goggles, and mittens with liner gloves.