start: on the a396 approximately 3 miles northwest of tavistock at the northern end of the lay-by at the top of wringworhty hill (gr sx504776). proceed north-westwards, okehampton direction, through mary tavy, across blackdown moor and past sourton services to fowley cross roundabout. give way and circle roundabout to retrace outward route and past the start point. finish approximately 2 miles from tavistock opposite the “trout and tipple” public house (gr sx493757). intermediate mileage – fowley cross 11.7 miles.