Department of the InteriorMap showing Upper Colorado River basin and San Juan River sub-basin boundaries with a National Geographic style basemap. The basin and sub-basin boundaries were taken from the the U.S. Geological Survey (USGS) Watershed Boundary Dataset.Filehttps://hub.arcgis.com/datasets/e5560bf4db31468fbcace6d695cf95daengU.S. Fish and Wildlife Service Open DataPublicUpper Colorado River Basin WTL1 [U.S. Fish and Wildlife Service]Web servicesUnited StatesLast modified 2022-05-09