A good  recommendation is  to stay at Pueblo del Rio just beside the Rio Mendoza, 5 minute from Potrerillos, with beautiful cottages , swimming pool and eco adevnture office just in the premises. From there you can do a 4 hours horse riding with very kind Juan Carlos (tel 02622 424291) and his son who will guide you from the Quebrada del Toro, up  to almost 3000mts in the heart of the Andes mountains only accompanied by the Andean Condor and the guanacos. And of course a magnificent view