- The Himalayas, geologically young and structurally fold mountains run in a west-east direction from the Indus to the Brahmaputra.
- Their name translates from Sanskrit as “abode of the snow”, with the highest concentration of glaciers outside the Polar Regions.
- The Himalayas represent the loftiest and one of the most rugged mountain barriers of the world.
- Coverage- 13 states and Union Territories
- States- Himachal Pradesh, Uttarakhand, Sikkim, West Bengal, Manipur, Meghalaya, Mizoram, Nagaland, Tripura, Assam, and Arunachal Pradesh.
- Union Territories- Ladakh, Jammu and Kashmir
- Water tower of Asia- The region is responsible for providing water to a large part of the Indian subcontinent and contains various flora and fauna.
- Third pole- IHR is the part of Hindu Kush-Karakoram-Himalayan system (HKKH), a mountainous region west and south of the Tibetan Plateau.

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