As you get closer to Chacaltaya you will gradually start to feel the temperature falling. A number of lagoons will be visible and you can make stops to take photos with the stunning landscape behind you. A winding, dusty road climbs steeply up the mountain and you will arrive at the 5100 meter refuge after approximately 2 hours from La Paz.
The views from the refuge and summit of Chalcaltaya are stunning and this is rare chance to get up this high without mountain climbing and equipment. Illimani and Huayna Potosi are just two of the mountains viewable. Return to La Paz will be at around 17.30/18.00.