Big Mallard Marsh Walleye abundant. Moderate number of pike and perch. All Features General Information Sportfish Available: Walleye, Northern Pike, Yellow Perch, Common Carp, Acres: 1853.2, Shoreline Miles: 16.8, Max Depth: 14.9 Locate 47.257059, -99.278794 Big Mallard Marsh Open in MapsOpen in Maps