Tour du Mont Blanc 
Altitude sickness and the Tour du Mont Blanc
Altitude sickness is not a problem on the Tour du Mont Blanc. The highest altitudes reached on the regular Tour du Mont Blanc are no more than 2600 metres and if you take some of the more adventurous variants you only reach 2800m. Consequently, you should only feel a shortness of breath and a slightly faster pulse rate throughout the trek. Altitude sickness normally happens when you are well over 3000 metres and heading up to 4000 metres. It will only affect mountaineers in the Alps and trekkers who head to the Greater Ranges.