This is the Tri County Corridor running from Ashland to Superior, WI. There is heavy ATV use on this trail and snowmobile during the winter. Nevertheless, it is a nice day ride with a few hills. It runs parallel to Hwy 2 so if a problem develops, you can make it back to civilization. Some trails branch out from it that you can explore.
How to get there:
Ashland: Take Hwy 13 to Sanborn Ave (west end of Ashland) Go south a few blocks to the Cenex station. Trail starts just south of the station and is clearly marked.