GeographyHimalayas. However, parts of Lohit, Changlang and Tirap are covered by the Patkai hills. Kangto, Nyegi Kangsang, the main Gorichen peak and the Eastern Gorichen peak are some of the highest peaks in this region of the Himalayas.
In 2006 Bumla pass in Tawang was opened to traders for the first time in 44 years. Traders from both sides of the pass were permitted to enter each other's territories.
The Himalayan ranges that extend up to the eastern Arunachal separate it from China. The ranges extend toward Nagaland, and form a boundary between India and Burma in Changlang and Tirap district, acting as a natural barrier called Patkai Bum Hills. They are low mountains compared to the Greater Himalayas.
The climate of Arunachal Pradesh differs with the elevation. Areas that are at a very high elevation in the Upper Himalayas close to the Tibetan border enjoy an alpine or Tundra climate. While below the Upper Himalayas are the Middle Himalayas, where people experience a climate which is temperate. Areas at the sub-Himalayan and sea-level elevation generally experience a humid sub-tropical climate, along with the hot summers and mild winters.
Arunchal Pradesh receives heavy rainfall of 80 to 160 inches (2,000 to 4,000 mm) annually, most of it between May and September. The mountain slopes and hills are covered with alpine, temperate, and subtropical forests of dwarf rhododendron, oak, pine, maple, fir, and juniper; sal (Shorea) and teak are the main economic species.
The state's airports are located at Daparjio, Ziro, Along, Tezu and Pasighat. However, owing to the rough terrain, these airports are mostly small and cannot handle many flights, they were actually used for transportation of food, when these parts were not connected by the roads. Arunachal Pradesh has two highways; the 336km (205 miles) National Highway 52, completed in 1998, connects Jonai with Dirak. There is another highway which connects Tezpur in Assam with Tawang.Now in 2007, every village is connected by road. It's due to the funding that central government has provided. Every small town has got its own bus station and daily bus services are available. All places are connected to Assam, which has increased the trading capacity. A National Highway is being constructed on the famous Stillwell Ledo Road, which connects Ledo in Assam to Jairampur in Arunachal.
Arunachal Pradesh attracts tourists from many parts of the world. Tourist attractions include the Namdapha tiger project in Changlang district, Sela lake near to Bomdila, the bamboo bridges hanging over the river. Religious places of interest include Malinithan in Lekhabali and Rukhmininagar near Roing, the place where Rukmini, Lord Krishna's wife in Hindu mythology, is said to have lived; Parshuram Kund in Lohit district, is believed to the lake where Parshuram washed away all his sins. Rafting and trekking are also available. A visitor's permit from the tourism department is required.