The Prairie River drains into Lake Superior through a narrow gap in the bedrock between Marathon and Terrace Bay. From this gap, an undulating ridge-dune complex radiates northward. Moving north, the swales between the ridges become progressively wetter. A swale is a marshy depression in a tract of land, usually rolling prairie.
Park Facilities and Activities: A footpath cuts through this reserve, which is otherwise without facilities.
Location: On Superior’s north shore about 40 km west of Marathon.