Distance: 143.3km (89.0 miles); Elevation: 832m (2730 feet) [map]

Compared to day 3, this is a walk (or ride…) in the park, as the terrain flattens right off on the way towards Belgium. The middle section of the day passes through the stunning countryside of the Caps et Marais d’Opale Park, and the route then joins the Canal de Bourbourg where the concept of terrain pretty much stops. Prepare yourself to see an awful lot of canals over the next few days…