The Slack (, ) is a coastal river in the Pas-de-Calais department, in northern France. It rises at Hermelinghen on Mount Binôt, flows through Rinxent, Marquise, Beuvrequen, Slack (village near Ambleteuse) and flows into the English Channel in Ambleteuse next to Fort Mahon. References Rivers of the Pas-de-Calais Rivers of France Rivers of Hauts-de-France 0Slack Hauts-de-France region articles needing translation from French Wikipedia