The Coudekerque-Branche–Fontinettes railway runs along the English Channel and North Sea coast of France from a junction near Gare de Coudekerque-Branche in Dunkirk to a junction near Gare des Fontinettes in Calais. It is 41.159 kilometres (25.575 miles) long and unelectrified single track for much of its length except for the first 10 kilometres (6.2 miles) from Dunkirk which is double track electrified with 25kV 50 Hz.