One of the best things about the Manali region is the natural mountain environment, and no better to get amongst it than on one's own 2 legs! From a day walk in the forests up behind Manali, to an extended trek into the high alpine wilderness regions, there is no more satisfying way to experience the wonder of this natural wonderland. Things to know about trekking here though, is to be very careful about the time of year you are setting out. The winter is strong and heavy snowfall can be expected from December through to March (then consider skiing from Solang). Monsoon is also quite heavy from mid July through to late September. Not that monsoon rules out trekking, but be prepared for wet weather. There are stunning treks that start from Manali that head over to the dry desert regions of Spiti Valley which are suitable for the monsoonal period. (Try the Hampta Pass trek if you have a week or so.) Optimal trekking times are the summer (April to July) and then late Sept to November for crisp clear air and stunning views. 

There are many trekking companies located in Manali who are very happy to organise guides, horses, food etc. Shop around and make sure you feel comfortable with the guide, as he will be your best friend and companion for the duration of the journey. Make sure he is local and has a deep understanding of the region. Ask about what kind of food they will supply, and don't be shy to make special requests.