Included on the Ultimate USA Cutthroat Map, plus PDFs and KMZs providing additional information are available from the download system.
The Colorado River Cutthroat survives in a range located in central and western Colorado, eastern-central Utah, and southwestern Wyoming. This relatively southerly, desert location means that most populations surive only in relatively isolated, headwater streams. Streams are coded as “CorePop” (navy blue) – genetically pure populations that are being specifically managed to conserve the genetic stock; “ConPop” (medium blue) – other populations of cutthroat that aren’t considered genetically pure but are being managed for specific conservation objectives; and “CTPresent” (light blue), which represents streams where cutthroat live, typically in combination with exotic species and often genetically hybridized.
Streams data was integrated from a variety of sources, including maps and appendixes data originally published in pdf form: including the 2005 & 2010 Range-wide Status Reports for Colorado Cutthroat Trout, and a BLM GIS dataset for the Colorado Plateau.
Photo: CRCT Streams from a variety of sources; shown on a USGS National Map Topo basemap