A trekking trip can be of any length you choose. Popular short treks are available around the Kathmandu and Pokhara valleys, which can be complete in one, two or three days while longer treks last from a week to a month. It is even possible to combine a series of popular treks together and peak climbing for months on end.
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 meters. Anyone who enjoys regular exercise and is in god 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 meters. A reasonable level of fitness is required as you are required to follow routes that ascend and descend. A hill walking background is advisable.
Strenuous 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 meters. You should be physically fit and appropriate preparation is imperative. Some days may involve crossing a pass with up to 10 hours walking.