The main trekking areas in Himachal are the Dhauladhar and Pir Panjal ranges, routes over the passes between the Shimla region and the Kullu valley, the numerous treks out of Kullu and select treks in the Trans-Himalyan regions of Kinnaur, Lahaul and Spiti. Most trekking areas are between 1500 metres and 6000 metres.
With numerous trails, the variation in terrain is also enormous. Low scrub-land and paths through paddy fields, give way to trails strewn with pine needles. Then come woods of oak and flowering rhododendron, which merge into forest of Himalyan cedar - 'deodar' - and spruce. On most trails, small pastoral hamlets dot the way. Cunningly hidden between the high mountains are passes which were once known only to migrant shepherds and dare all traders. These lead to the fabulous wastes and swift rivers of the arid Trans-Himalya. A host of combinations and variations take the trails through changing countryside. The degree of physical output can also be changed to suit your requirements. For example, the same trek can be developed from a week to last longer. Or, the two ends of a trek can be the same, but the trails can be designed to be taxing, or gentle.