Bordering Mayanmar in the East, this is the most recently created district of Arunachal Pradesh. The Natural beauty of this area is multiplied many folds by its vibrant people and their culture. Longding is historically been inhabited by the wancho people, who practice Gun making, wood carving and bead making. Oriah is the main festival of the Wancho tribe of Tirap district, celebrated during March-April every year just after snowing paddy in the jhoom plots.
This valley forms a part of Patkai ranges. This area is covered with ever-green forests. The area has motor able road upto Pongchao in Longding district.