Since the city is nestled in a hilly terrain and surrounded by breathtaking hills, trekking is one of the top things to do in Dehradun. Therefore, the valley act as a starting point for many treks including Nag Tibba Trek, Chakrata Trek, Dhanaulti Trek, Bhadraj Hill, and Rishikesh Trek. One your way, you will be surprised by the many sightings of unique flora and fauna. Even though trekking is a delight in Dehradun, it is recommended that you take part in it during the months of June and December