The starting point for all is the Cerro Arco, located 14km from the city of Mendoza, in El Challao, Las Heras. It has a road for vehicles. The climb path lasts between 1.30 and 2 hours depending on the training. There are people who raise or lower it running. Once in the antennas of the summit you can see the whole city and a large part of Las Heras. It is a short trek that can culminate with a lunch or mid afternoon at the entrance fee, very crowded on weekends. Full moon nights are promoted in groups and then celebrate with a great barbecue at the entrance hostel. Very easy, 2 to 3 hours walking, between ascent and descent.
Santo Tomás and El Gateado (2110 masl). These hills can be accessed from the Cumbre del Arco, following the edge to the west to reach first the Cerro Santo Tomás and then the Gateado. Most prefer to climb the bed of the Casa de Piedras River. If you choose this route you do not have to climb the Arco hill, you have to enter through the gate or Puerta de La Quebrada that you see on the left, as soon as you enter the Arco road. From there you have to go through the famous stone of Isidris, walk an hour more until you find the path that leads to Santo Tomás and the Gateado, on the way you can also see the Viscacha hill. Easy but good physical condition is required, 6 to 7 hours walking between ascent and descent.