Last week I went on an unexpectedly gorgeous day hike near Santiago in Cajón del Maipo. These are the foothills of the Andes around Santiago - just two hours away! My housemates and I went to a reservoir called Embalse el Yeso, which was created by damming the Yeso River. In the wintertime here, we were hiking in a bit of snow, but its was still nice and warm.
Embalse el Yeso is at about 2,500 meters. It provides a large portion of Santiago's drinking water. We hiked all around the water, then ended up in the dry lake bed at the base of the river. It was a huge landscape of clay!