The approximately 17-kilometer-long route, which is becoming considerably overgrown from Zuydcoote to the border with Belgium, has not been used for years: the last freight train rumbled between the two countries in 2002, and a tourist train served the route until 1992.
In Leffrinckoucke, the tracks run parallel to the coastal strip through the dunes. A branch is also from the railway line to the nearby steel factory.