Here is a video of Tunnelton RD and the a place they call the Devils Backbone. On Microsoft streets and trips it shows a road called the Delils Backbone RD. When I got down there it was not called that. The Devils Backbone is just a road that runs a long a ridge and a pull off. It was in a map book that the HOG puts out.
The video is 205 MB in size and 14:59 minute long.