Dunes of the Slack river at Wimereux

fr

A beautiful walk taking you through several natural environments: dunes, forests, beaches and cliffs.

Technical sheet

n°13379452
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  • Walking
    Activity: Walking
  • ↔
    Distance: 6.04 km
  • ◔
    Average duration: 1h 50 
  • ▲
    Difficulty: Easy
  • ⚐
    Return to departure point: Yes
  • ↗
    Vertical gain: + 51 m
  • ↘
    Vertical drop: - 52 m
  • ▲
    Highest point: 36 m
  • ▼
    Lowest point: 4 m
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Photos

Dunes de la Slack
Dunes de la Slack
Fort Mahon
Dunes de la Slack

Description of the walk

Start: Park in the car park of the Pointe aux Oies.

(S/E) Go slightly right along the path that crosses the small dune to the Parking des Allemands. Turn right, away from the sea, to the D940.

(1) Cross at the crosswalk, then go through the wooden gate onto the sandy path. Climb up to the viewpoint.

(2) Continue through the Slack dunes on the winding path for 2.5 Km to the Slack car park. Discover the different aspects of the dunes, from the white dune planted with Oyats, to the dune with sea buckthorn shrubs, then different pine forest sectors. Cross the large dune leading to the undergrowth, then climb up to the edge of the Slack River.

(3) The path passes under the road bridge, crosses the Slack car park and arrives at a wide paved path running alongside the dune and estuary. Continue towards the sea and reach the pebble beach with Fort Mahon in view, and discover the estuary.

(4) Turn left and follow the beach back to the Pointe aux Oies car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 15 m - Pointe aux Oies car park
  2. 1 : km 0.74 - alt. 15 m - Crossing the D940
  3. 2 : km 0.99 - alt. 36 m - Viewpoint
  4. 3 : km 3.13 - alt. 10 m - Bridge under the D940 - Slack (fleuve)
  5. 4 : km 3.97 - alt. 6 m - Beach - View of Fort Mahon
  6. S/E : km 6.04 - alt. 15 m - Pointe aux Oies car park

Practical information

Start: Park in the car park of the Pointe aux Oies.

Terrain: A fairly strenuous walk on sandy paths.

Reviews and comments

4.6 / 5
Based on 23 reviews
Reliability of the description
4.6 / 5
Clarity of route map
4.4 / 5
Route interest
4.8 / 5
david51350
david51350

Overall rating : 4 / 5

Date of walk : Jun 22, 2025
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★☆ Good
Busy trail : No

A short stroll through the dunes, nothing more

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franclel62
franclel62

Overall rating : 5 / 5

Date of walk : Dec 29, 2024
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

In the dunes of Ambleteuse and then along the sea, still the English Channel at this point, with a passage near the Fort d'Ambleteuse at the entrance to the Slack estuary built by Vauban at the end of the 17th century in 1680, this walk allows you to discover the Opal Coast coastline in all its splendour and unspoilt natural beauty.

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frimousse59
frimousse59

Overall rating : 4.3 / 5

Date of walk : Nov 01, 2024
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : Yes

An interesting circuit combining dunes, forests, beaches and small ponds. You just have to pay attention to the tide times for the passage to the goose point.

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jean-lucB
jean-lucB

Overall rating : 4.7 / 5

Date of walk : Sep 20, 2024
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

Very nice circuit in the "planted" dunes. The pure sand dunes are not normally accessible for protection reasons (and yet you can see people climbing them...).

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Gilles-a
Gilles-a

Overall rating : 4.7 / 5

Date of walk : Sep 15, 2024
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★☆ Good
Busy trail : No

An interesting circuit. As already mentioned, part of it is in the sand, which makes the walk a little more tiring. The path through the dunes is very well laid out. It's best to return to the beach and check the tide times beforehand. The tour was completed within the time indicated, without rushing and with plenty of photo breaks.

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Une marcheuse
Une marcheuse

Overall rating : 4.3 / 5

Date of walk : May 11, 2024
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★☆ Good
Busy trail : No

A pleasant and fairly easy walk, but beware of tide times. We did it in the opposite direction to avoid being blocked by the sea on the way back.

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Micka Bou
Micka Bou
• Last modified:

Overall rating : 4 / 5

Date of walk : May 17, 2024
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Busy trail : No

As a result of erosion, many diversions from this path have been put in place.
However, this walk is still very interesting for understanding the topography, the flora and fauna and their interactions with this particular environment, the coastal dune.

I would recommend

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Thierry Pasteur
Thierry Pasteur

Overall rating : 4.3 / 5

Date of walk : Feb 27, 2024
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : Yes

Very nice walk. Landscapes, the sound of the waves, very clean and very well maintained. Beware of the gradients and the sand, which can quickly tire the unaccustomed.

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MA Gosset
MA Gosset

Overall rating : 5 / 5

Date of walk : Feb 14, 2024
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

This is the first time we've used the site, and quite honestly, I'd recommend it, because from departure to arrival, you're transported to your destination without making any mistakes via your mobile phone and/or the beacons.
I recommend this site despite the fact that you have to pay for it....personally, I subscribe to it on demand, when I'm planning a region to visit! It's really not expensive for the service it provides!
Thank you to the team, and .... see you soon for new adventures!

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arnaudbdeparis
arnaudbdeparis

Overall rating : 5 / 5

Date of walk : Feb 19, 2024
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

A very nice circuit starting from the car park facing the sea. Very well signposted. We did it in winter, so it wasn't very busy. From time to time we came across resting places for migrants with abandoned sleeping bags. The flora is inevitably different depending on whether you are near the sea or inland, with a lot of work by the people who have marked out the path (a sort of bridge to cross the marshes).
Beware of being a little difficult at the start for very young children as the paths are sandy.
The end on the beach is very nice because of the buried bunkers, but beware of the tide times.

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MICHEL DELAYE
MICHEL DELAYE

Overall rating : 5 / 5

Date of walk : Oct 07, 2023
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

Lovely walk along the dune, alternating between oyats, arbutus and pine trees, reminiscent of moorland. Nice return via the beach

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Petske
Petske

Overall rating : 4.3 / 5

Date of walk : Sep 10, 2023
Reliability of the description : ★★★★☆ Good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : No

Beautiful walk in the dunes with magnificent views. I personally felt that the time given to do it was too short as just getting to Ambleteuse took us a while as walking in the sand slows down a lot. So we didn't do the loop and stopped in Ambleteuse. Someone picked us up there. We'd already done a walk between Wimereux and Ambleteuse and knew that the way back to the car park by the beach is strewn with rocks and pebbles, which isn't easy at all. You need good shoes to protect your feet. You also need to know that if you want to cross the river at Ambleteuse there is no bridge at the beach and you have to take off your shoes as the water can reach halfway up your leg.

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Jean Luc PECHNYK
Jean Luc PECHNYK

Overall rating : 4.7 / 5

Date of walk : Sep 05, 2023
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : Yes

I think that for the end of the circuit, it's best to continue along the beach and climb the steps that lead almost directly back to the start car park. That way, you don't have to go back to the Germans' car park and retrace the section through the dunes that you covered on the outward journey.

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David PM
David PM

Overall rating : 4.7 / 5

Date of walk : Aug 18, 2023
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★☆ Good
Route interest : ★★★★★ Very good
Busy trail : Yes

The last part has to be done on the beach, even climbing over rocks; there are no paths on the dunes. It's a lovely walk, but a physical one, as you have to walk in the sand of the dunes.

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Arnaud LY
Arnaud LY

Overall rating : 5 / 5

Date of walk : Aug 13, 2023
Reliability of the description : ★★★★★ Very good
Clarity of route map : ★★★★★ Very good
Route interest : ★★★★★ Very good
Busy trail : No

A beautiful walk alternating between dunes, woods and beach.

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