Is altitude sickness a risk in the High Atlas?

Altitude sickness is a real but manageable risk on the highest High Atlas treks, particularly climbing Mount Toubkal at 4,167 m, where the thin air can cause headaches, nausea and breathlessness — but ordinary valley hikes and desert tours are low enough not to worry about it. It only becomes a concern above roughly 3,000 m.

On Toubkal, the two-day ascent gives limited acclimatisation, so go at a steady pace, hydrate well, and descend if symptoms worsen. Most people manage fine with sensible pacing, but pushing too fast to the summit is what triggers problems.

For the Tizi n’Tichka pass, the gorges, Imlil village walks and the Sahara, altitude isn’t an issue. Reserve your caution for the very high peaks, and follow your guide’s advice on pace and rest.