KMZs and other files showing the distribution of wild trout in UT are available from the download system (updated 2014).
Across the state of Utah, whenever the elevation climbs above about 5,500 feet, there’s a good chance of finding wild trout.
Source: Google Earth image with data provided by UT Dept. of Environmental Quality via US EPA WATERS database (blue/teal), UTDWR (Green-Yellow-Orange-Red), and CRCT Conservation Group (pink)
In the image above, the blue/teal lines mark stream segments designated as cold water habitat by the UT DEQ (the thicker, blue lines mark streams designated as “major” by this group). It, roughly speaking, defines the areas where it is possible to locate wild trout. Cold water habitat within Indian Reservations is NOT coded in this file, so a subtantial amount of trout habitat may be missing here.
The Green-Yellow-Orange-Red streams mark BVCT conservation pops, based on the 2004 Range-Wide Status of Bonneville Cutthroat Trout published by the Utah Division of Wildlife Rsources. The color indicates the overall health rating of the population.
Utah opposed listing BVCT as a threatened species, and so the available information is more limited than with the Federally funded conservation programs for other cutthroat variants. This report is the only publicly available document that provides detailed information about the location and status of Bonneville, and even this is restricted because UTDWR no longer seems to distribute it from its website. We managed to get a copy from another source.
Pink streams show Colorado River Cutthroat trout on the Colorado Plateau,based on data from the 2010 Range-Wide Assessment of Colorado River Cutthroat Trout by the CRCT Conservation Team, an inter-agency group comprised of COPW, UTDWR, WYGF, USFS, BLM, USFWS, NPS.
Streams are designated as follows:
- CorePop (dark pink) – conservation populations holding genetically pure (>99%) CRCT
- ConPop (medium pink) – other conservation populations, typically 90% or better purity and/or other specific qualification to be managed as a conservation population
- CTpresent (light pink) – streams supporting wild CRCT, but not managed as conservation populations (typically signficantly hybridized)
All of these datasets are currently available for download. Check out the Bonneville Cutthroat page of the Natives downloads tab, and the Utah category in the “Streams” section of the “download” page.