The Lys River is a river located in northern France, primarily flowing through the Hauts-de-France region. It is approximately 90 kilometers long and is a tributary of the Escaut River. The river is known for its scenic landscapes and is an important waterway for local agriculture and transportation. The Lys River has several towns along its banks, including Lille and Armentières. It plays a significant role in the local ecosystem, supporting various wildlife species. The river is also popular for recreational activities such as fishing and boating, attracting both locals and tourists.