well... it really depends on what BigMike (and the others driving a long distance) are looking for ?
Rock + Snow?
The roads that I know of are shy on rock but have deep snow that's fun to plow around in and the roads go back along ways so you could easly make a day or weekend trip out of it.
These "trails" are roughly about 45 min's away from my home off Hwy 20 heading twords Grass Valley.
What about Iron Mt up at Sly Park?