Bois de Sioux River
The Bois de Sioux River drains Lake Traverse, the southernmost body of water in the Hudson Bay watershed of North America. It is a tributary of the Red River of the North and defines part of the western border of the U.S. state of Minnesota, and the eastern borders of North Dakota and South Dakota. It is about 41 miles (66 km) in length.
|Bois de Sioux River|
The Bois de Sioux River below the dam of Lake Traverse. Roberts County, South Dakota is at left, and Traverse County, Minnesota is at right.
Red River drainage basin, with Bois de Sioux River highlighted
|⁃ location||Dam at the foot of Lake Traverse, South Dakota|
|Confluence with the Otter Tail River to form the Red River|
|951 ft (290 m)|
|Length||41 mi (66 km)|
|Progression||Bois de Sioux River → Red River → Lake Winnipeg → Nelson River → Hudson Bay → Atlantic Ocean|
The river flows northward from a Corps of Engineers dam at the north end of Lake Traverse and shortly enters Mud Lake. Downstream of Mud Lake it is a small stream, and its flow has been channelized and straightened in some places so that the watercourse diverges slightly from the historic state boundary. It passes the town of White Rock, South Dakota before joining the Otter Tail River to form the Red River of the North at Wahpeton, North Dakota, and Breckenridge, Minnesota.
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data The National Map Archived 29 March 2012 at the Wayback Machine, accessed 8 June 2011
- U.S. Geological Survey Geographic Names Information System: Bois de Sioux River
- Upham, Warren (1920). Minnesota Geographic Names: Their Origin and Historic Significance. Minnesota Historical Society. p. 554.