Slack (river)

The mouth of the Slack at Fort Mahon

The Slack is a coastal river in France, which runs in the Nord -Pas -de- Calais Pas- de -Calais. It rises in the municipality of Hermelinghen, in the Regional Natural Park of Caps et Marais d' Opale, drained generally in a westerly direction and joins after 22 kilometers at ambleteuse, on the municipal boundary to Wimereux, in the English Channel.