start on b2139 by footpath sign at entrance to kithurst farm and almost opposite new town road, storrington (tq077141). proceed southwest on b2139 via amberley and houghton to whiteways lodge roundabout (9.4km).(check & marshals) encircle roundabout (care) and retrace on b2139, taking care on the descent through houghton village to finish at point opposite large oak tree situated approximately mid-way along lay-by on south side of road approximately 1km short of start.