Hills in North East

A portion in the lower Himalayan mountains range is known as Assam Himalaya between the border of Bhutan and the Great Bend of the Tsangpo River. 

• Yarlung Tsangpo River originates from Lake Manasarovar in Mount Kailash and known as "Dihang river" in Arunachal Pradesh. Yarlung Tsangpo is the upper stream of Brahmaputra River that flows through its origin, Tibet, known by its Tibetan name. It originates at Angsi Glacier in western Tibet southeast of Mount Kailash and Lake Manasarovar. It later forms the South Tibet Valley and Yarlung Tsangpo Grand Canyon before passing through the state of Arunachal Pradesh, India, where it is known as Siang. Downstream from Arunachal Pradesh the river becomes wider and at this point is called the Siang. After reaching Assam, the river is known as Brahmaputra. From Assam, the river enters Bangladesh at Ramnabazar. 
• Siang and its Tribhutaries: Lohit, Kameg, Dikrong, Tirap, Dibang, Subansiri, Dihing, Kamlang flow through Brahmaputra River.
• Namcha Barwa is the highest mountain peak of Assam Himalaya range.

Most the part of Arunachal Pradesh is covered by the great Himalayas and rest of the part with by the Patkai hills. 

• Gorichen peak is the highest Himalayan peak in the region, located between Tawang and West Kameng district of Arunachal Pradesh. 
• Namdapha National Park, Mouling National Park are two national parks in Arunachal Pradesh.

The patkai mountain range also known as Purvanchal Range, one of the eight mountain range in India and the major of India’s North Eastern states. 

• Patkai Range consists of the three major hills, the Patkai-Bum,the Garo-Khasi-Jaintia and Lushai Hills. 
• Pangsau mountain Pass is the best place to see its conical peaks, steep slopes and deep valleys.

The Lushai Hills also known as Mizo Hills is one of the three part of Patkai mountain range, located partially in Mizoram and Tripura. 

• Mizo Hills is highly covered with dense bamboo jungle and open grass covered slopes.
• Blue mountain is the highest peak of Lushai Hills.

The hills of Khasi is the part of major Garo-Khasi range in Meghalaya and also the part of the Patkai mountain ranges. Khasi Hills got its name by Khasi tribes of the region. 

• Cherrapunji-the wettest place in the world is situated in the East Khasi Hills and Lum Shyllong is the highest peak near to Shillong.

The Garo Hills is located in Meghalaya state and part of Garo-Khasi range,The region is known as one of the wettest places on earth. 

• Garo Hills highest peak is known as Nokrek Peak and home to many places of interest such as cloud covered Tura peak, Imilchang Dar waterfall,Balpakram Wildlife Park,Naphak Lake and most famous limestone caves of Siju,one of the longest in Asia.

The Naga Hills are actually part of Indian Territory mountain ranges of Arakan Mountains between the western Burma and the Naga Hills district. Naga Hills is one of the major tribal region of Nagaland state and inhabited by Naga people.

The Jampui hill range is one of the most famous place in northeast state of Tripura and habitants are mainly Mizo or Lushai. 

• Jampui Hills is famous for its unique Orange Festival,view of rising and setting sun and excellent panoramic views of the deep valley and villages around.

The Chin Hills is a range of mountains extends northward from Manipur to Chin State of Myanmar. 

• Chin Hills are the part of Arakan Mountain Range with an highest peak of Nat Ma Taung with 3,053 m(10,500 feet). 
• Chin Hills are very close to Lushai Hills of Patkai Range and offers a wide range of flora and fauna.