Included on the Ultimate USA Cutthroat Map, plus PDFs and KMZs providing additional information are available from the download system.
The Yellowstone Cutthroat lives principally in the NW Wyoming Highlands in and around Yellowstone National Park and northward into southwestern Montana. Parts of its range touch northern Nevada, northern Utah, and southern Idaho. A sub-sub variant, the Snake River Finespot Cutthroat is, for Federal listing purposes, considered a “Yellowstone” cutthroat. Note that you can zoom in to Level 14 (approximately 1:35K). If you have a pointing device, you can mouse-over or click hot spots that provide additional information about each population.
Streams are coded as “CorePop” (mustard brown) – genetically pure populations that are being specifically managed to conserve the genetic stock; “ConPop” (yellow) – other populations of cutthroat that aren’t considered genetically pure but are being managed for specific reasons; and “CTPresent” (light yellow), which represents streams where cutthroat live, typically in combination with exotic species and often genetically hybridized.
Source: Multiple sources (see below); USGS hybrid basemap
The web map was created by WildTroutStreams.com principally from the 2009 Assessment GIS dataset, which is distributed without restrictions on its use. The data includes information about abundance, genetic purity, and habitat. The 2009 assessment data was created by the GIS group at Montana Fish, Wildlife, and Parks working on behalf of the Yellowstone Cutthroat Trout Interagency Coordination Group. This pooled data from Montana, Idaho, and Wyoming Fish and Game departments, the USDA Forest Service, and the USDI Fish and Wildlife Service.