Dunes of the Slack river at Wimereux

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

Details

n°13379452
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 6.04 km
  • ◔
    Average duration: 1h 50 
  • ▲
    Difficulty: Easy
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 51 m
  • ↘
    Descent: - 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

Notes

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

Terrain: A fairly strenuous walk on sandy paths.

Reviews and comments

4.5 / 5
Based on 33 reviews
Reliability of the description
4.5 / 5
Ease of following the route
4.3 / 5
Route interest
4.7 / 5
User 18059112

Overall rating : 4.7 / 5

Date of your route : Apr 04, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Really lovely and varied. Walking on the sand is certainly a workout! It might be useful to include a link to a website where visitors can check the tide times.

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pascale ruelle
pascale ruelle

Overall rating : 5 / 5

Date of your route : Feb 20, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

pleasant stroll

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User 28216035

Overall rating : 4.7 / 5

Date of your route : Dec 18, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Very pleasant walks

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User 19056432

Overall rating : 3.7 / 5

Date of your route : Oct 27, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Please note: return journey only possible at low tide at Pointe aux Oies, otherwise turn back
What a shame.

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User 17113814

Overall rating : 4.7 / 5

Date of your route : Aug 16, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

Yes, especially during the summer season

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User 22862681

Overall rating : 3.7 / 5

Date of your route : Aug 25, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : Yes

Part of the hike was difficult because of the sand, but otherwise there's nothing to complain about. One important detail to note when you return to the car park at Pointe de l'Oie along the beach: watch out for the tide

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Eric&Clarisse
Eric&Clarisse
• Edited:

Overall rating : 5 / 5

Date of your route : Aug 12, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

An easy walk for everyone, including children. Enjoyable to observe different environments and landscapes. The return trip via the beach is superb. Be sure to check the tide times as it is impossible to do this at high tide. Impeccable description. Thank you to the contributor.

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User 3933767
• Edited:

Overall rating : 4.7 / 5

Date of your route : Jul 21, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A simple and pleasant walk

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Jldaubresse @yahoo.com
Jldaubresse @yahoo.com

Overall rating : 2.7 / 5

Date of your route : Jul 08, 2025
Reliability of the description : ★★☆☆☆ Disappointing
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★★☆ Good
Very busy route : No

The tour was great, BUT impossible to do at high tide, which was quite inconvenient.

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Murielle62
Murielle62
• Edited:

Overall rating : 4.3 / 5

Date of your route : May 30, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A hike to do if you want to have a good time with the family, whatever your age. You will discover very different environments between the dune massif (shaded in summer, ideal!) and the return via the beach, if you have taken care to check the tide times.

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david51350
david51350

Overall rating : 4 / 5

Date of your route : Jun 23, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A short stroll through the dunes, nothing more

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User 26146316

Overall rating : 4.7 / 5

Date of your route : Jun 09, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Beautiful hike

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franclel62
franclel62

Overall rating : 5 / 5

Date of your route : Dec 30, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : 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 your route : Nov 02, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : 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 your route : Sep 21, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : 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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