San José Volcano is the stratovolcano that gives its name to a massive volcanic group, at about 90 km (56 mi) from Santiago de Chile at the end of the Cajón del Maipo on the Chile-Argentina border. It lies on the south end of an approximately 10 km (6 mi) x 5 km (3 mi) complex that includes the , Espiritu Santo, Plantat and Marmolejo volcanoes, the latter of which is located on the Northern end of the group.