Garmin TOPO U.S. 100K Includes topographic coverage of the entire U.S. Provides detailed digital topographic maps, comparable to 1:100,000 scale USGS maps Contains detailed hydrographic features, including, coastlines, lake and river shorelines, wetlands and perennial and seasonal streams Allows you to search by points of interest, including cities, summit, lakes, campsites, trails, and more. Provides elevation profile on compatible Garmin devices so you can estimate terrain difficulty