Dehradun located in the uttarkhand is good place for summer vaccation. having mountains rivers waterfall and other natural resources dehradun is also affordable place for friends family and also for couple temperature is become moderate. mussorie is located nearest to dehradun great place for river rafting there are many waterfall there.
But in summer vaccation too many peoples comes in dehradun for their vaccation due to which the enviroment become crowdy and the price of hotels and food become increase. my experience is good in dehradun but if you plan to go dehradun go in winter season accomodation food everything is cheaper and you may see snowfall