Clouds enveloping Cotopaxi

Seen from the north, from the slopes of Sincholagua. It's almost 9 am now. On this particular day, we could see almost all of the mountain until after 8, when the clouds started building up. This pattern turned out to repeat itself quite a lot, with the main difference being the time when the mountain wasn't visible anymore. Mostly that happened earlier. 11 December 2010.