Hey I am late but once in a while I have to earn money so I can play and prospect.
Plum Creek, Rock Elm in Pierce County, and or course glacial deposits down form Canada. The Cheguamegon and Nicolet Forests may have possible placer deposits too.
There is not a lot in the state but rumors are that you also have diamonds.
Story about gravel pits. Last year the junior high school did a unit on the gold rush. As part of their learning they actually made up routes, prospected and carried in supplies. I was helping with the panning part and each kid was given a bag of gravel to pan. I had before the day started, salted three bags with real flour gold of my own. When we panned out the bags, we actually found five bags containing gold. Who ever got the gravel must have hit a pretty good spot.