Go to the French Customs controls and immediately after them is a turn to the right with a black and white sign for centre ville. That takes you to a roundabout. Go straight over that and you ride north past the factories/oily stuff until a turn left takes you on a hump-backed bridge over the motorway. That gives you access to a network of lanes that lead through bird reserves to Gravelines, which is an old fortified town with a star plan.
Eat there. Head south through more small lanes towards Guines, where the road rises to go through woods (crested tits abound). Loop round on some other bits and you are back to Coquelles and a run in to Sangatte and an easy climb to Cap Blanc Nez. Whoosh back down through Bleriot plage and Sangatte to the seafront and your ferry.
