The west to east demarcation of the Himalayas is as follows.
1. Punjab Himalayas - The part of Himalayas that lie between Indus and Satluj is called Punjab Himalayas.
2. Kumaon Himalaya - The part of Himalayas lying between Satluj and Kali rivers is known as Kumaon Himalayas.
3. Nepal Himalayas - The part of Himalayas that lie between the Kali and Tista rivers is called the Nepal Himalayas .
4. Assam Himalayas - The part lying between Tista and Dihang rivers is known as Assam Himalayas.