Great Lakes Waterway River between Huron and Erie. Usually, one or more U.S. Coast Guard icebreakers help keep the water passage open for part of the fall and early winter, although shipping usually ceases for two to three months thereafter. The Great Lakes Waterway is co-administered by the governments of Canada and the United States of America. The waterway allows passage from the Atlantic Ocean to the inland port of Duluth on Lake Superior, a distance of and to Chicago, on Lake Michigan, at . Together with the Saint Lawrence Seaway, the Waterway allows both ocean-going vessels and the ore, grain and coal-bearing
Brule Lake (Minnesota) federal wilderness area for which Brule Lake serves as an entrance point. Brule Lake is one of the largest lakes in the eastern Arrowhead Region of Minnesota. It has an area of 4272 acres, and a maximum depth of 78 feet. It sits 1851 feet above sea level. It measures approximately eight miles from east to west, and one mile from north to south. Brule Lake is located in the Duluth Complex, a geological region marked by bands of softer, more erodible bedrock, and "red rock," a harder and less easily eroded stone, which forms protruding ridges across the Superior