the start is located approx. 1 mile west of dishforth on the unclassified road leading to ripon, at the eastern end of field gateway on the northern side of the road, 10 yards east of power pole 30 (on southern side of road), and approx. 0.25 mile west of the a1. proceed east under a1 and via two roundabouts down slip-road to join a168 (1.135 miles), continue along a168/a19 to slip road leading to knayton (11.541), left and then right (11.981) over a19 and right again (12.101) to join a19 southbound. proceed to slip-road to dishforth (22.952), bear left onto roundabout (23.287), take 2nd exit and proceed on a168 to finish approx. 0.7 miles beyond the windsock at dishforth airfield, at a mark opposite the centre of the fourth of six emergency openings to the a1(m).