The Watonwan River is a tributary of the Minnesota River, located in south-central Minnesota, USA. It flows through several counties, including Watonwan County, and is approximately 50 miles long. The river is known for its scenic beauty and provides habitats for various wildlife species. The Watonwan River is popular for recreational activities such as fishing, canoeing, and kayaking. Its waters support a diverse ecosystem, making it an important natural resource for the surrounding communities. The river also plays a role in local agriculture by providing irrigation and drainage for nearby farmland.