Altitude, honestly: what to expect on high-mountain treks

Headaches, slow starts and lost appetite are normal. Build in acclimatisation days, drink more than you think you need and walk at the pace of the slowest person.

What altitude feels like

Most people notice altitude above about 2,500 metres. Mild headaches, poor sleep and a smaller appetite are common in the first days.

Most people notice altitude above about 2,500 metres.

Give your body time

Plan acclimatisation days, climb slowly and sleep lower when you can. Our high-altitude itineraries build these days in.

Know when to turn back

Severe headache, confusion or breathlessness at rest are warning signs. Tell your guide straight away. Descending is the most effective treatment, and you should seek medical advice before any high-altitude trip.