After breakfast, start trek to Nag Tibba Top from the Nag Tibba base. You can take a view of Swargarohini, Bandarpunch, Gangotri ranges, etc from the Nag Tibba Top. After spending a few hours at Nag Tibba Top, trek down to Nag Tibba base. On arrival at Nag Tibba base, proceed to Pantwari. Lunch will be served at Pantwari village. After lunch, drive to Dehradun. On arrival at Dehradun, take an overnight train/bus to Delhi to reach your onward destination