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Dunes of the Slack – Fort d'Ambleteuse loop from Wimille – Wimereux

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Hiking trails & Routes

Dunes of the Slack – Fort d'Ambleteuse loop from Wimille – Wimereux

Hard

4.7

(88)

511

hikers

Dunes of the Slack – Fort d'Ambleteuse loop from Wimille – Wimereux

05:05

19.4km

150m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: June 17, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Parc naturel régional des Caps et marais d'Opale

Waypoints

Start point

Train Station

Get Directions

1.58 km

Wimereux Beach

Highlight • Beach

Diverse beach - sand, rocks, cliffs - everything there.

Translated by Google •

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4.14 km

Sand Fences in the Dunes de la Slack

Highlight • Structure

Picket fences serve as coastal protection. They stabilize the dunes and protect them from erosion. The fence slows the wind, and sand collects around the pickets and settles behind the fence.

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Tip by

4.37 km

Dunes de la Slack is a beautiful nature reserve on the Opal Coast, between Wimereux and Ambleteuse. The area is named after La Slack, a river that flows through the dunes and flows into the sea at Fort d'Ambleteuse. The area is ideal for hikers and nature lovers. There are several walking routes available, including the 'La Baie de Saint-Jean' walk, which partly coincides with the GR120 du Littoral. The dunes are a varied dune area of the Parc naturel régional des Caps et marais d'Opale.

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7.85 km

Fort d'Ambleteuse

Highlight • Historical Site

This fort is the only one left of the seven that defended the coast of Boulogne.
In 169, the English king James II, chased away by his subjects, came ashore in the already silted up harbour. When Napoleon planned an invasion of England, part of his fleet was located here. From the beach you have a view of the entrance to the port of Boulogne and in clear weather even of the English cliffs.

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9.20 km

Beach

13.2 km

Passerelles en bois

Highlight • Other

13.4 km

Wooden Boardwalk Through the Dunes de la Slack

Highlight • Trail

Wooden footbridge allowing you to cross the marshy area of the Slack at the entrance to the dunes. This beautiful path crosses the entirety of the dunes of the Slack to the coast at the Wimereux golf course.

Translated by Google •

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13.9 km

Dune Viewpoint in Parc Naturel Régional des Caps et Marais d'Opale

Highlight • Viewpoint

Beautiful piece of dunes near a small bypass.

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14.9 km

Viewing Platform in the Dunes of Parc Naturel Régional des Caps et Marais d'Opale

Highlight • Viewpoint

The panoramic board is nice to orient yourself.

Translated by Google •

Tip by

19.4 km

End point

Train Station

Way Types & Surfaces

Way Types

11.5 km

4.27 km

1.92 km

1.27 km

239 m

146 m

Surfaces

9.75 km

4.44 km

2.67 km

1.04 km

981 m

478 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Weather

Tuesday 23 June

28°C

21°C

0 %

Additional weather tips

Max wind speed: 15.0 km/h

to get more detailed weather forecasts along your route

Comments

June 21, 2023,Dunes de la Slack Runde ab Wimereux

If the weather is cloudy, we are in Wimereux dir. Launched Dune de la Slack. It took more than 2 hours until the sun came out🥴 the route was still great👍👍 part of the route was closed, the path was no longer available. It was a very varied hike, partly very strenuous due to many stretches of sand. Dune stop😉

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Dunes of the Slack – Fort d'Ambleteuse loop from Wimille – Wimereux

Wimereux Beach

Sand Fences in the Dunes de la Slack