There are lines on the map, separated by a gap. These lines go up into the Andes, one approaching from the west, Chile, the other coming from the east, Argentina. All the mountain roads here go east and west. All thoughts of north-south progress remain on the plains outside the mountains. The traffic remains there too, so rather than fight for a place besides cars, we’ll spend some time traversing the range and then connect passes via some other means. First up: Paso Piuquenes to Paso Portillo, from Santiago, Chile to Mendoza, Argentina.
Santiago – San Gabriel – Paso Piuquenes – Refugio Real de la Cruz – Paso Portillo – Refugio Portinari – Tunuyan – Mendoza.