The route from Siwan to Dehradun covers about 950 km. The most efficient way is to take a train to Haridwar or Dehradun directly. The journey takes approximately 18 to 20 hours. You will pass through the plains of Uttar Pradesh before entering the foothills of the Himalayas.
Total Distance: 950 km by road, 800 km air distance.
Book early as this route is popular with tourists.
March to June or September to November.