START approx. 3.5 miles south of Boroughbridge, in entrance to A168 from old A1 (now a long layby) at a point approx. 1 yard before "Clearway" sign. TURN LEFT on to A168, and proceed south to Walshford Traffic Island (4.72 mls). ENCIRCLE ISLAND and retrace north along A168, past start, to Boroughbridge South Traffic Island (12.27 mls) ENCIRCLE ISLAND and retrace south on A168 to finish at triangular road sign warning junction to left just north of start point (15.0 mls).