<Tr> <Th> Vehicle registration </Th> <Td> UK - 07 </Td> </Tr> <Tr> <Th> Website </Th> <Td> dehradun.nic.in </Td> </Tr> <P> Dehradun (/ ˌdɛərəˈduːn /) or Dehra Dun is the interim capital city of Uttarakhand, a state in the northern part of India . Located in the Garhwal region, it lies 236 kilometres (147 mi) north of India's capital New Delhi and 168 kilometres (104 mi) from Chandigarh . It is one of the "Counter Magnets" of the National Capital Region (NCR) being developed as an alternative centre of growth to help ease the migration and population explosion in the Delhi metropolitan area and to establish a smart city at Dehradun . During the days of British Raj, the official name of the town was Dehra . </P> <P> Dehradun is in the Doon Valley on the foothills of the Himalayas nestled between the river Ganges on the east and the river Yamuna on the west. The city is famous for its picturesque landscape and slightly milder climate and provides a gateway to the surrounding region . It is well connected and in proximity to Himalayan tourist destinations such as Mussoorie, and Auli and the Hindu holy cities of Haridwar and Rishikesh along with the Himalayan pilgrimage circuit of Chota Char Dham . </P>

What was the official name of dehradhun during british raj