Marshes and Opal Coast


Between Gravelines and Boulogne sur Mer, the Opal Coast unfolds its white sandy beaches, chalk cliffs, dunes and marshes. A superb mosaic of landscapes to discover on this 310 km (5.5 hours) circuit.



There are 4 tourist stops on this route. You are free to stay for a few minutes or a few hours.

  1. Gravelines
  2. Cap Blanc Nez
  3. Cap Gris Nez
  4. Slack Dunes


1. Gravelines: A fortified town by the sea, Gravelines has a family beach with a huge foreshore and beach huts.



2. Cap Blanc Nez: Located a few minutes from Calais, Cap Blanc-Nez is one of the must-see places on the Opal Coast with its breathtaking view of the Strait and the English coast. Discover its cliffs, its fine sandy beach and its walking paths.



3. Cap Gris Nez: Cap Gris-Nez is one of the leading destinations on the Opal Coast. It takes its name from the colour of its rocks. With a height of 45 metres, it offers a spectacular view of the English coast when the weather is good.



4. Slack dunes: Between dune panne, pine forest and beach, discover the multiple landscapes of the dunes of the Slack and the richness of their biodiversity. A lovely 5-kilometre loop that ends with a breathtaking view of the fort of Ambleteuse.


GPS Track