The Grand River is a tributary of the Missouri River located in south-central Iowa. It flows through several counties, including Decatur, Wayne, and Lucas, and is approximately 100 miles long. The river is known for its scenic beauty and provides habitats for various wildlife species. The Grand River is popular for recreational activities such as fishing, canoeing, and kayaking. It also plays a role in local agriculture, as its waters support irrigation for nearby farms. The river's watershed is an important ecological area, contributing to the region's biodiversity and natural resources.