The Doon River is a river located in the state of Uttarakhand, India. It flows through the picturesque Doon Valley, which is known for its lush greenery and scenic beauty. The river is a tributary of the Yamuna River and plays a vital role in the local ecosystem. The Doon River is significant for the surrounding communities, providing water for agriculture and daily needs. It also supports various wildlife species and contributes to the region's biodiversity. The river's banks are often used for recreational activities, making it a popular spot for locals and tourists alike.