Before you head off into the mountains, you may consider selecting a few items to take with you. Click on item to pack.
A map is one of the "Seven Essentials". Take it with you and the an on-line map will help you on your way.
The mapping function is provided by both Google Maps and Bing Maps, the latter embedding highly detailed mapping from Ordnance Survey. Ordnance Survey's 1:25,000 Explorer OL 16 "The Cheviot Hills", covers the area in great detail.