Garmin LakeMaster Iowa/Illinois Freshwater Map microSD Card Contains coverage of more than 300 lakes in Iowa and Illinois including Big Creek, Coralville, Five Island Lake, Lost Island, Okoboji Lakes, Saylorville, Silver, Spirit, Storm, Carlyle, Chain of Lakes, Kincaid, Matoon, Newton, Rend and Shelbyville 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