Uspallata Pass, Mountain pass between Argentina and Chile in Mendoza Province

Uspallata Pass is a mountain crossing through the Andes at approximately 3,832 meters (12,572 ft) elevation, linking Mendoza Province in Argentina with Los Andes in Chile. The Pan-American Highway and the Cristo Redentor Tunnel provide modern passage through this high-altitude route.

In 1817, General José de San Martín led military forces through this passage as part of the campaign to free Chile from Spanish colonial rule. This crossing became a key moment in South America's path to independence.

The pass is also called Paso del Cristo Redentor after the Monument to Christ the Redeemer, inaugurated on 13 March 1904 to mark the peaceful settlement of a border dispute that had nearly led Argentina and Chile to war. The name Bermejo comes from the reddish colour of the local mountains.

The pass road is a cornice route cut into rock and gravel, and the old camino was the obligatory link between Uspallata and Juncal until the Cristo Redentor tunnel opened near Las Cuevas. Las Cuevas, the nearest settlement, has fewer than 20 permanent residents, so services are scarce. Approach gradually from Mendoza to limit altitude sickness, and carry warm clothing for wind and sudden weather changes.

From this mountain pass, visitors can see Mount Aconcagua, South America's highest peak at about 6,962 meters (22,841 ft), rising to the north of the crossing. On clear days, the summit comes into view and dominates the northern horizon.