Climbing the Mont Blanc is popular among alpinists. The climb should however not be attempted by people lacking mountain climbing experience and equipment, even using the easiest route voie royale.
More generally, all high mountain hiking, climbing, and skiing, is potentially dangerous. Bad weather may turn an otherwise easy hike into a strenuous and possibly fatal journey ; weather in the mountains can change at short notice and you should always inquire about the latest forecast. Always carry a cell phone, should you need to call for rescue, though there is no guarantee it will work everywhere. Keep it turned off unless needed, so as not to drain its batteries needlessly.
After snowfalls, in some areas, avalanches can be expected â either natural or triggered in order to prevent further avalanching. Always inquire about avalanche hazards before embarking in hikes in the snow or off-track skiing. Even if you do not fear for yourself, please show consideration for the people who may be underneath you.
Altitude sickness may also be an issue. Using aerial lifts, one may get very fast to high altitude areas. For instance, when going up the Aiguille du Midi, you get lifted from around 1000m altitude Chamonix to 3840m in a very short time. You may experience shortness of breath and other symptoms.
