The Virginia Department of Game and Inland Fisheries (VDGIF) is one of the more enlightened states as it publishes good quality GIS information on wild trout. In November, 2014, we updated our offerings based on a new dataset (collected in 2011 instead of the original file’s 2005), and designed to be phone/tablet friendly. The image below was captured in an iPad.
Sources: Virginia Department of Game and Inland Fisheries (VDGIF), Google Earth
The image shows a detail of the VDGIF data for part of Shenandoah National Park. The stream lines indicate the “class” of the stream; the color of the triangle icons indicates species of the wild trout population (see below for key). If you’re using the KMZ in a phone or tablet, you’ll find it much easier to touch the triangle icons to bring up the details bubbles. On a computer, you can uses either the icons or the streamlines. The details are basically identical.
Trout streams that support natural trout reproduction are classified on a 4-level scale, Class I-IV. Light blue stream lines are Class I or II (Class I are lighter and slightly wider); Class III or IV stream lines are rendered maroon. Classifications are based on a combination of population and aesthetic criteria. Class I have good wild trout populations AND are considered beautiful; Class II support good populations; Class III fair populations; Class IV fair populations and have issues in the summer maintaining adequate flow.
Icon colors indicate resident species. Green is exclusively Brook Trout. Olive indicates Brook Trout plus non-native species. Brown is exclusively Brown Trout; pink indicates Rainbow Trout. Purple indicates Brown and Rainbows; gray is unknown.
Also, note the links to pages describing Shenandoah National Park, which is a logical stopping point for many wild trout fisherman in VA. On those pages, originally created for the 2006 site, you’ll find road maps and links to topo maps of the major drainages.