If you're looking for gravel biking roads, I found this great website in case you don't know about it:
gravelmap.com
Are any of you using it at all?
Gravel Routes in Illinois - Gravelmap - Gravelmap
Gravelmap is a tool for finding and sharing local gravel roads for biking, gravel grinding, exploration and more.
gravelmap.com
Are any of you using it at all?