How many days are needed to properly acclimatize?

Acclimatization is especially important for the 4-day Inca Trail and other multi-day Trails. Take at least 2 days to rest in Cusco before starting the Trail. If you have already been at high altitude (for example, in Puno), spend a few days there first. Usually, you’ll notice from your breathing and how your body feels that you are at altitude and need to take it easy. We recommend being at high altitude for at least 2–3 days before starting the Trail. You don’t need to be very active to acclimatize—in fact, a slow pace and plenty of sleep are very beneficial for your body.