Sajama star trail

© Stéphane Guisard, Los Cielos de América

Nevado Sajama is an extinct stratovolcano and the highest peak in Bolivia (6542meters above sea level). The mountain is located in Sajama National Park in the southwest area of the country some 1624 km (10-15 mi) from the border with Chile. The peak is an isolated cone, but is geologically complex, with lava domes of andesitic and rhyodactic composition overlain by an andesitic stratovolcano. The date of the most recent eruption is uncertain, although Holocene activity is assigned to the volcano by many. The treeline of Polylepis tarapacana on the volcano is as high as 5200m above sea level, one of the highest altitudes trees can be found growing anywhere in the world. This image was taken from Chile, Lauca national park, with Chungara (4517m above sea level)lake in the foreground.