The River Witham is a river located in the eastern part of England, primarily flowing through the county of Lincolnshire. It stretches approximately 66 miles (106 kilometers) from its source near South Witham to its confluence with the Humber Estuary. The river has played a significant role in the region's history, serving as a vital waterway for trade and transportation. The River Witham is known for its scenic beauty and diverse wildlife. It passes through several towns, including Lincoln, where it is a popular spot for recreational activities such as walking, cycling, and boating. The river is also part of the Witham Navigable, which allows for navigation by small boats.