This product has been discontinued. Garmin's inland G-charts are available for the contiguous 48 United States and provide detailed coverage of most inland lakes and reservoirs to a 1 nm scale. Interstates, national and state highways, and county roads adjacent to lakes and reservoirs covered are also displayed. A variety of other items such as boat ramps, dams, mile markers, marinas, campgrounds, and other areas of interest are also displayed. Once you're in the water, you'll be able to see what's beyond the next mile marker and quickly find fuel, first aid, or facilities. (Coverage must have been available at the time of production.) Depth contours are not provided. Garmin's inland G-charts are priced at $99.99 each.