Wisconsin isn’t as well known as a trout fishing destination compared to neighboring states such as, say, Michigan, but she does support thousands of miles of wild trout streams.
The image below illustrates the range of data which is available for free download. At this scale, it’s a little hard to see, but streams are presented as colored squiggles. These are downloadable as KML/KMZ files suitable for use in Google Earth, Google Maps, the National Map, and other mapping software and web services, so you can use them at much larger scales.
Source: WI DNR, TU CSI, Google Earth
These sources include mapping data for Class I (cyan) and Class II (orange) Trout Streams designated by the DNR. Parts of the TU CSI habitat databases for the Driftless Area and the Great Lakes Brook Trout cachement overlap WI boundaries. Additional information about the different data sets and color coding is available using the Download Tab and selecting Streams.