The Otter Tail River is a river in the west-central portion of the U.S. state of Minnesota. It begins in Clearwater County near Bemidji. It then flows through a number of lakes and cities in Minnesota, including Elbow Lake, Many Point Lake, Chippewa Lake, Height of Land Lake, Frazee, the Pine lakes, Rush Lake, Otter Tail Lake and Ottertail, West Lost Lake, Fergus Falls, and Orwell Lake. It finally joins with the Red River of the North, which forms the Minnesota-North Dakota boundary.

Rivers of Minnesota