Easy treks involve up to 6 hours of walking a day, on good trails with plenty of time for sightseeing. Altitudes generally do not exceed 3500 metres. Anyone who enjoys regular exercise and is in good physical condition should easily cope with these treks.
Moderate treks involve walking for 6 to 8 hours a day in more remote country, reaching altitudes of approximately 4500 metres. A reasonable level of fitness is required as there will be much ascent and descent with the occasional difficult day. A hill walking background is advisable.
Demanding treks are harder, suitable for regular hill walkers as they are generally more demanding and may involve 7 or 8 hour days, with altitudes up to 5500 metres. You should be physically fit and appropriate preparation is essential. Some days may involve crossing a pass with up to 10 hours walking.