START at minor road sign-posted Nenthead, Carrshield, Limestone Brae, Ninebanks, which is situated east of the A686 midway between Haydon Bridge and Alston. Proceed to the T-junction with the A686 and turn left in the direction of Alston. FINISH after 4 miles alongside large sign displaying WELCOME TO NORTHUMBERLAND’S BORDER COUNTRY at the beginning of a large, natural lay-by.