Aconcagua (äkōnkäˈgwä) [key], peak, 22,835 ft (6,960 m) high, Mendoza prov., W Argentina, in the Andes, near the Chilean border. It is the highest peak of the Western Hemisphere. The snowcapped Aconcagua was first scaled in 1897. Uspallata Pass is nearby. See also Ojos del Salado.
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