Aconcagua is a mountain in the Principal Cordillera of the Andes mountain range, in Mendoza Province, Argentina. It is the highest mountain in the Americas, the highest outside Asia, and the highest in both the Western Hemisphere and the Southern Hemisphere with a summit elevation of 6,961 metres. It lies 112 kilometres northwest of the provincial capital, the city of Mendoza, about five kilometres from San Juan Province, and 15 km from Argentina's border with neighbouring Chile.