Ruta Nacional 7 rises 3,000 metres from Mendoza's vine-covered foothills to the roof of the Americas in less than 200 kilometres.
The highway traces the spine of the Cordillera, passing through Potrerillos reservoir, Uspallata's ochre badlands, and the snow-dusted flanks of Aconcagua, the Western Hemisphere's tallest peak at 6,961 metres. On clear mornings between November and March, the summit appears as a white wedge against cobalt sky, visible for 90 kilometres. The road was completed in 1980, replacing a colonial mule trail that served as the primary link between Buenos Aires and Santiago for two centuries. Today it carries 12,000 vehicles daily during summer, most of them cargo trucks bound for Chilean ports, but the pullouts at Puente del Inca and Laguna de Horcones remain quiet.
This corridor matters because it distills the Andes into a single day. Visitors departing Mendoza at 08:00 reach Puente del Inca—a natural sulfur bridge spanning the Mendoza River—by 11:00, then continue to Aconcagua Provincial Park's entrance at Horcones Valley. The park logged 14,200 trekking permits in the 2025–2026 season, most of them single-day hikers walking the three-kilometre trail to Confluencia lookout, where the south face fills the horizon. The Inca Bridge, a stone arch spanning the Las Cuevas ravine at 2,719 metres, lies 15 kilometres west of the park entrance. Archaeologists date the structure to the 15th century, when it served as a Qhapaq Ñan waypoint for Inca messengers traveling between Cusco and southern outposts. The arch stands 28 metres above the river, wide enough for a single llama caravan.
High Andes tour Mendoza itineraries typically allocate 90 minutes at Puente del Inca, an hour at the Aconcagua viewpoint, and 45 minutes at the Inca Bridge, with a lunch stop in Uspallata. The route's altitude profile—sea level in Mendoza to 3,000 metres at Horcones—demands acclimatization pauses. Guides carry coca tea and recommend hydration stops every 30 minutes above 2,500 metres. The landscape shifts from irrigated vineyards to phreatophyte scrub at Potrerillos, then to bare scree and snowfields above Uspallata. Guanaco herds graze the valley floor near Punta de Vacas; Andean condors circle thermal updrafts along the ridgeline. The return descent takes two hours, reaching Mendoza by 18:00 with the city's lights spreading across the piedmont plain.
12 hr
