Cerro Mercedario is the highest peak of the Cordillera de la Ramada range and the eighth-highest mountain of the Andes. It is located 100 km to the north of Aconcagua, in the Argentine province of San Juan. It was first ascended in 1934 by Adam Karpiński and Wiktor Ostrowski, members of a Polish andinist expedition led by Konstanty Jodko-Narkiewicz.