The essential acclimatization day trip from Confluencia. A 4-5 hour round trip to the base of Aconcagua's south face — a nearly 3,000m wall of rock and ice that dwarfs anything in the Alps. Most guided expeditions include this as a mandatory acclimatization day before the push to Plaza de Mulas. The view alone justifies the entire trip.
Distance
9.6 km
Max elevation
4,100m
Duration
1 day (from Confluencia)
Safety classification
DifficultyMulti-day trek
GuideGuide recommended
GearTraction / poles
OfficialYes
MaintainedNo
Season
Park summer season 1 Nov-30 Apr; day-trekking window 15 Nov-10 Apr; rangers, medical service and helicopter fully operative only 1 Dec-6 Mar. Outside the season the park is closed and unserviced (Andean winter). CRITICAL: for the 2025-26 season, as in 2024-25, Plaza Francia itself is NOT authorized - all Horcones-valley trekking permits end at Confluencia camp.
Hazards
▲Altitude illness: Confluencia camp ~3,300m, Plaza Francia ~4,250m; park regulations cap all trekking at 4,300m with sanctions for exceeding it
Hypothermia and frostbite in sudden weather changes (agency-listed risks for all park treks)
▲Night exposure: park requires Horcones-valley arrival by 4pm because of the risk of hiking after dark; activities are suspended for weather
▲No authorization or patrol beyond Confluencia: continuing to Plaza Francia is currently prohibited, so anyone there is outside the ranger/rescue framework
Do not plan or sell this route as reachable now. The Gobierno de Mendoza seasonal decree for 2025-26 (second consecutive season) ends all Horcones-valley trekking at Confluencia and explicitly does not authorize Plaza Francia visits. The classification above describes the park's own historical Short Trekking route (permit-only, 3 days/2 nights camping at Confluencia, non-technical but high-altitude) for when the agency reopens it. Until the decree changes, the legal endpoint is Confluencia (~3,300m, day trek 15 Nov-10 Apr with permit). Verify the current decree at the start of every season before listing.
Verified 2026-08-23Official source ↗Gobierno de Mendoza — Parque Provincial Aconcagua