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Large beach – Fort d'Ambleteuse loop from Ambleteuse

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Hiking trails & Routes

Large beach – Fort d'Ambleteuse loop from Ambleteuse

Moderate

4.5

(300)

1,440

hikers

Large beach – Fort d'Ambleteuse loop from Ambleteuse

02:04

7.91km

60m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 21, 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

Parking

Get Directions

2.07 km

Large beach

Highlight (Segment) • Beach

Part of the GR 120, but the hiking trail is interrupted due to an eroded dune.

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Tip by

3.15 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.

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4.66 km

Frog Pond Boardwalk

Highlight • Structure

Frog pool where the planks are still flooded at high tide. Fortunately everything is well secured.

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4.86 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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5.44 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.

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5.62 km

Passerelles en bois

Highlight • Other

7.18 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 …

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7.91 km

End point

Parking

Way Types & Surfaces

Way Types

4.23 km

2.39 km

771 m

488 m

< 100 m

Surfaces

3.72 km

2.20 km

1.02 km

779 m

108 m

< 100 m

Elevation

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

Weather

Wednesday 26 August

23°C

18°C

-- %

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Comments

August 6, 2023,Dunes de la Slack – Pointe aux oies boucle au départ de Ambleteuse

Attention, a part is no longer accessible, the path has collapsed, at the level of the beach before the car park

Showing Translation

November 22, 2024,Dünenrunde bei Ambleteuse (Dunes de La Slack)

On this tour you have to climb over a field of rubble from a rockfall. According to the signs, it is not possible to get through, but if you are fairly sure-footed and feel safe, you can "climb" over it - of course at your own risk, pay attention to the weather, and watch the coast carefully. In this area, …

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May 24, 2022,Dunes de la Slack

Attention, the road over the dunes along the sea has been washed away! At low tide you can easily cross the beach and take the path to the right just before the Slack.

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December 29, 2023,Wandeling Dune de Slack

A walk suggested in the Euroreizen.be brochure. But the brochure stated that the walk was interrupted. There were only Belgians in the parking lot.
We leave on a cobblestone road between the dunes and the Slack and arrive at Ambleteuse Fort. The weather is very changeable.
At the fort we continue walking between the sea and the dunes. It's high …

Showing Translation

July 12, 2022,Dunes de la Slack – Grande plage Rondje vanuit Ambleteuse

Short walk from slack in Ambleteuse. Lots of sand but the closing was great. Hotel 'les Baigneurs in Ambleteuse, very tasty espresso for only 1.30 euros with a large glass of water included. For lovers of art deco style.

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July 19, 2023,Dunes de la Slack vanuit Ambleteuse

The Slack is a small river 22 km long that winds its way from its source at Mont Binôt near Hardinghen until it finally flows into the sea on the Opal Coast at the fort of Ambleteuse. It is at this place that we start our family-friendly walk. To the left of the Slack there is a very special dune …

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May 17, 2024,Sentier de la Slack 🇫🇷

Beautiful tour from the L'Eglantier campsite. The dunes are great and you walk through very fine "hourglass sand". It's quite strenuous.

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September 1, 2025,Ambleteuse an der Opalküste, Dünen de la slack

A wonderful loop, first along the almost deserted, very large beach, near Fort d'Ambleteuse, then through the dunes.
It's tiring to walk on the sandy paths, but absolutely fantastic 🤩

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Large beach – Fort d'Ambleteuse loop from Ambleteuse

Large beach

grande plage

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

Frog Pond Boardwalk

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

Wooden Boardwalk Through the Dunes de la Slack

Passerelles en bois

Fort d'Ambleteuse

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