Garmin MapSource LakeMaster Minnesota Freshwater Map microSD Card Contains coverage of more than 3,900 lakes in Minnesota including Big Cutfoot Sioux Lake, Gervais Chain Provides detailed shorelines and depth contours, including 1-foot contours for many lakes created from on-the-water surveys Displays islands, reefs, points, bays, inlets, access points, boat ramps and aquatic vegetation Includes rivers, streams, river and creek channels, interstates, highways, and general roads