The map shows you the relevant parts of Mendoza Province. Blue boxes for the most important places. San Bernardo is located very close to Vallecitos. As you can see the higher peak Plata is not far away. Cordon del Plata is on the way to the Aconcagua Massif and therefore perfect for acclimatization.
In the lower left hand corner, the cover of the map is shown. The best road map for the area.