This picture was taken at 9 AM a little above the Cara Sur refuge (4000 m / 13,123 ft.), located, as its name suggests, on the slopes of the south face of Cotopaxi volcano.
The south face of the Cotopaxi volcano (5897 m). Normal ascent route is located nowadays on the N-W face of the Cotopaxi. The south face was the original route of the first ascent made by Wilhelm Reiss November 28, 1872.