Here is a link to online West Virginia County Maps.The maps show what is suppose to be gravel roads. I am working on another Google Map database from Preston, Monongalia, Tucker and Taylor Counties. http://goo.gl/maps/11Bpp Why a another google database? I find it easier to plan route routes looking at google maps. Why there? My Mother in-law lives near there. It will give me a better excuse to visit. I can't wait to check some of them out.
Here is a link to Charlottesville Bike Clubs website. https://www.cvillebikeclub.org/archive/cbc/maps.htm They have posted up some gravel routes around the Charlottesville area. Maps and Que Sheets, very nice.
Here is the link to the Virginia Dept. of Transportation's county maps. They are not online but they are cheap to buy. 5o cents each or $35 for the whole State. They are a little out of date, some of the roads they say are gravel are actually paved now. All the better reason to have a google map database for accuracy.VDOT County Maps
Enjoy!