The Manas River is a significant river located in the northeastern region of India, primarily flowing through the state of Assam. It is a tributary of the Brahmaputra River and is known for its rich biodiversity and scenic beauty. The river plays a crucial role in the local ecosystem and supports various wildlife species. The Manas River is also associated with the Manas National Park, a UNESCO World Heritage Site. This park is famous for its population of Indian rhinoceroses and other endangered species. The river's waters are vital for irrigation and support the livelihoods of many communities along its banks.