Little only by comparison to the longest river in the US, the Little Missouri River flows for over 500 miles across Wyoming, Montana, South Dakota, and North Dakota. The river has played an important role in the for those living in the Great Plains since humans arrived in the area over 12,000 years ago. Today it can be enjoyed for its beauty as well as the multitude of recreational activities it supports such as fishing, kayaking, swimming, hiking, camping, and biking.