Salkantay Trek Altitude Sickness:
You have to acclimatize at least 2 days in Cusco in order to avoid altitude sickness during the hike. The elevation of Cusco is 3380m 11089 ft. once in Cusco if you start feeling light headache, nauseas, dizzy or you feel heavier those symptoms are normal especially for those people who come from see level after two days in Cusco those symptoms are gone. But in order to kill those symptoms. you have to drink coca tea and also lot of water it is going help you a lot if you walk around in Cusco or if you do the sacred valley tour or city tour while you are in Cusco is going help a lot to acclimatize because you go to different altitude elevations during the tours. And also if you know any pill for altitude sickness such as Diamox you should start taking days before to start the trek. If you do these recommendations you will not get altitude sickness during the hike.