Start on the far straight approx. 50 yards from the first bend. Continue anti-clockwise for 12 laps of the full circuit then continue to finish in the first slip road (25 miles). Start and finish points are both clearly marked on the road. Finish is the same as used for 10 mile events.

1 full lap = 2.04 miles X 12 laps = 24.48 miles + 0.52 miles to the finish.