A polygon dataset of current trails footprints (including ice roads) in the SNK REA derived from the Alaska Department of Natural Resources infrastructure data, Northwest Arctic Burough winter trails data and BLM Iditarod National Historic Trail data (see the process steps for details). (From the Alaska Department of Natural Resource Infrastructure data metadata: This data depicts infrastructure locations in Alaska as digitized primarily from 1:24,000, 1:63,360, and 1:250,000 USGS quadrangles. The source document that represented the newest information and best geographic location was used to capture the data. All infrastructure from the primary source document was digitized and then supplemented with the information from other source [...]