Abstract: This map layer consists of National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extracting these wilderness areas from the National Atlas map layer: Federal Lands of the United States. This is a replacement for the December 2004, map layer. Purpose: These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. No responsibility is assumed by the National Atlas of the United States in the use of these data.