The Little Sioux River is a tributary located in the state of Iowa, flowing through several counties before joining the Missouri River. It spans approximately 100 miles and is known for its scenic beauty and recreational opportunities, including fishing and kayaking. The river's watershed supports diverse ecosystems and wildlife, making it an important natural resource. The surrounding areas are often used for agriculture, contributing to the local economy. The Little Sioux River also plays a role in flood management and water quality in the region.