Har Ki Dun. Har means the name of Lord Shiva and Dun means Valley. The valley of Lord Shiva. This valley has enchanting scenery, untouched civilization, and a view of the Himalayan peak (Swargarohini). It is the most popular trek destination in Uttarakhand. This valley is covered by snow from December to March. Any time of the year whether it is summer or winter. You can visit this Har Ki Dun Valley.