This early map (post 1903) shows the route of both lines.
The Quend line is shown terminating at the Depot rather than at the Station (opposite the Hotel) nearer the coast.
Map produced in 1924 of Fort-Mahon-Plage. The position of the station can be seen, as well as the route of the line through Royon.
Map produced by U.S. Army Map Service, showing the only remaining stretch of tramway from Junction Fourrier to Routhiauville in 1944.