Around Mers-les-Bains, Eu and the Bois de Cise

A lovely walk to discover the beautiful villas of Mers-les-Bains. Pass through the marshes before discovering Eu and its castle. A beautiful climb to the Chapelle Saint-Laurent to discover the Bois de Cise.
Please note that the return route along the cliffs following thePR® trail, which offers beautiful views of the coast, is closed by municipal decree following recent cliff collapses.
By keeping well to the left of the path, it is still possible to enjoy the views.

Details

251856
Creation:
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Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 19.96 km
  • ◔
    Average duration: 6h 20 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 229 m
  • ↘
    Descent: - 220 m

  • ▲
    Highest point: 108 m
  • ▼
    Lowest point: -2 m
  • ⚐ Country: France
  • ⚐ District: Mers-les-Bains (80350)
  • ⚑
    Start/End: N 50.066639° / E 1.386301°
  • ❏
    IGN map(s): Ref. 2008OT, 2107OT
  • Hour-by-hour weather

Photos

Description of the walk

(S/E) Departure from Place de Mers-les-Bains.

Go to the roundabout on the left. Follow Rue Julien Hedin to reach Esplanade du Général Leclerc.
Follow the esplanade on the left. At the end, follow Avenue Foch until you reach the D1015. The Mers train station is on your left.

(1) Pass in front of the station, Place Pierre Sémard. At the end of the street, turn left and continue for 50 metres.
Go over the lock and join the roundabout on the left. Follow Quai Édouard Gelée on the left and go along the marina.

(2) At the end of the quay, take the mobile bridge on the right. After crossing, take the path on the left that runs along the canal on the right. At the end of the path, turn left and continue for 40 metres.

(3) Follow the path on the right. You are now in the Marais Sainte-Croix (see sign). The path runs alongside the Ancien Canal de Penthièvre on your right. Continue and follow the path on the left before reaching the D925 road. After 100 metres, take the footbridge over the Bresle.

(4) Turn right after the footbridge and go under the bridge.
Follow the path along the river on your right for 600 metres. Before the school, turn left (signposted Chemin des Étangs). Turn right into Rue Adolphe Galy. At the end of the street, continue right onto Avenue de la Gare and go straight ahead.

(5) Cross the Busine river and continue along Avenue de la Gare. Continue for 150 metres, cross the Bresle bridge.

(6) Turn right and follow Boulevard Hélène for 120 metres. You will see the Jardin des Fontaines on your right. Continue to Rue des Fontaines and turn right. Continue along Route de l'Abbé Cochet. You will see the castle on your left. Continue along the road, which turns left and joins Allée des Guises. Pass the castle gardens on your left.

(7) In front of the castle, turn right and then left into Allée du Cheval. You will see the equestrian statue of the Duke of Orleans on your right. Cross the car park,

(8) Turn left in front of the collegiate church (visit the crypt). Turn right after the collegiate church and go around it on the paved path. At the Place d'Orléans below, follow Rue de l'Abbaye to the left.
Continue to the intersection, turn right and go under the archway after descending a few steps

(9) You are now at the Hôtel Dieu (1658). Cross the park and exit. Turn left, then right to follow Rue Charles Morin. At the first intersection, turn left onto Boulevard Hélène until you reach the bridge over the Bresle.

(6) Turn right onto Boulevard Hélène until you reach the next bridge. Cross the bridge to the left, follow Rue Digue Catrix and then continue along Rue La Busine (the name of the river on your left).

(10) The street turns 90° to the right; continue to join Rue Chaussée de Picardie. Turn left and, after 200 metres, you will reach a roundabout. Turn right and cross Route de Gamache.

(11) Follow Chemin de Saint-Laurent des Pèlerinages and immediately after, continue on the main road which climbs for 600 metres.

(12) At the top on the right, you will see the Chapelle Saint-Laurent. Turn left and after 500 m you will come to a three-way junction. Continue right on the paved road for 1,300 m, passing under a power line.

(13) Cross the D925 (be careful of traffic). Take the road opposite and, after 30 metres, turn onto the path that branches off to the right. At the intersection, continue straight ahead on the path. After 700 metres, leave the path on your left and continue straight ahead.

(14) At the intersection in Saint-Quentin-la-Motte, take Rue Henri Dunant opposite. At the end of the street, turn left onto Rue du Stade. At the crossroads, continue straight ahead onto Ruelle du Charron. At the end of the lane, turn left onto Rue de Bas and, after 50 metres, turn right onto Rue de l'Église.

(15) After 80 metres, turn left onto Allée du Château. Continue straight ahead for 600 metres until you reach Ruelle Bisgaret, which turns right onto Rue André Delignières. Turn left.

(16) After the bend, take the first right, Ruelle du Moulin, which becomes a path after 300 metres. Continue straight ahead. At the intersection, turn left and follow the path for 500 metres to join the D940.
Follow the D940 on the right. After 150 metres, follow the D940E on the left towards Bois de Cise.

(17) After 250 metres, take the path on the left, then turn right to follow the Bois de Cise, Chemin du Grand Mont. After 250 metres, turn right onto Sentier des Pervenches, then turn left onto the second road, Route du Vieux Chêne. After 50 metres, take the small path on the left, Allée Marie.
Follow this path for 1,200 metres and at the sixth intersection, turn left onto Allée du Muguet.
Follow this lane to the top, then turn right.
The passage is closed at this point, but it is still possible to pass through.

(18) Continue to the viewpoint 200 metres ahead. Continue on your left to follow theGR® trail that runs along the cliffs.
The barrier crossings are clearly marked (you will need to climb over them).
Follow theGR® trail, which is well marked. Do not stray from the trail at any point, as there is no fence between you and the edge of the cliff. Be careful, as some of the valley paths are very slippery when wet.
You will arrive at a viewpoint. You will see Mers-les-Bains below and the statue of Notre-Dame de la Falaise on your left.

(19) Descend to Mers-les-Bains and join Rue de la Falaise, which you follow to the right.

(20) At the church, take the steps on the right that lead down to Rue de Jules Barni. Follow this street, which will take you back to the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 6 m - Place de Mers-les-Bains
  2. 1 : km 1.09 - alt. 8 m - Mers-les-Bains railway station
  3. 2 : km 1.86 - alt. 6 m - Mobile bridge - Bresle (fleuve)
  4. 3 : km 2.35 - alt. 7 m - Old Penthièvre Canal
  5. 4 : km 3.74 - alt. 4 m - Bridge
  6. 5 : km 4.81 - alt. 5 m - The Busine River,
  7. 6 : km 5.06 - alt. 7 m - Bresle Bridge
  8. 7 : km 5.9 - alt. 18 m - Château musée Louis-Philippe de Eu
  9. 8 : km 6.1 - alt. 18 m - Turn left
  10. 9 : km 6.44 - alt. 7 m - Hôtel Dieu
  11. 10 : km 7.15 - alt. 5 m - On the right
  12. 11 : km 7.41 - alt. 7 m - Roundabout
  13. 12 : km 7.96 - alt. 84 m - Saint-Laurent Chapel
  14. 13 : km 10.25 - alt. 107 m - Crossing the D925
  15. 14 : km 11.2 - alt. 103 m - Intersection
  16. 15 : km 12.03 - alt. 98 m - Allée du Château
  17. 16 : km 12.76 - alt. 104 m - Saint Quentin Castle
  18. 17 : km 14.42 - alt. 90 m - Bois de Cise
  19. 18 : km 16.07 - alt. 69 m - Viewpoint over the cliffs
  20. 19 : km 18.93 - alt. 86 m - Statue of Our Lady of the Cliff
  21. 20 : km 19.57 - alt. 28 m - Church
  22. S/E : km 19.96 - alt. 6 m - Place de Mers-les-Bains

Notes

Good walking shoes and walking sticks in wet weather.
If you follow the GR trail along the cliffs, stay well away from the edge.
Do not take children with you.

Worth a visit

The sea wall at Mers-les-Bains.
The town of Le Tréport.
The Château d'Eu
The Collegiate Church of Eu
The Forest of Eu
The Bois de Cise.
The Hables d'Ault.
The Bay of Somme

Always be cautious and plan ahead when you're outdoors. Visorando and the author of this route cannot be held responsible for any accidents occurring on this route.

The GR® and PR® markings are the intellectual property of the Fédération Française de Randonnée Pédestre.

Reviews and comments

4.5 / 5
Based on 28 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4.5 / 5
Route interest
4.5 / 5
nini vil
nini vil

Overall rating : 3.7 / 5

Date of your route : Aug 08, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

As I am not from the area, it might be useful to specify when you change towns, between Mers and Le Tréport, between Le Tréport and EU, so that it is easier to find your way around if you are unsure.
The street names given are often far apart, and the names of bridges are not specified.
It's a long drive to get to EU, unless we took a wrong turn
We had a wonderful time discovering EU, the castle, the garden, the houses with bow windows in Mers, the lovely little climb to the St Laurent chapel (Point 11: chemin ST Laurent: it's the grassy path that branches off to the left), not to mention the cliffs, of course.
We started the hike in St Quentin la Motte, where there was no problem parking in the town hall car park.

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Marc 62
Marc 62

Overall rating : 5 / 5

Date of your route : Jun 23, 2024
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike with a good variety of landscapes: discover Eu and its castle, the magnificent Mers sea wall, the countryside (a little bit)....
The Bois de Cise is well worth a detour to explore a little; it's really beautiful and so peaceful.
There are a few nice climbs, especially on the way out of Eu (short but a bit steep!).
Thanks to the author

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dominique.chevalier
dominique.chevalier

Overall rating : 5 / 5

Date of your route : May 20, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Excellent itinerary and a beautiful discovery of the peaceful woods with their houses nestled in a picturesque setting

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Manu Cote 51
Manu Cote 51

Overall rating : 4 / 5

Date of your route : May 12, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★☆☆☆ Disappointing
Very busy route : No

far too much tarmac and village crossings on a 20 km hike

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legodvicien
legodvicien

Overall rating : 5 / 5

Date of your route : Apr 13, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A very beautiful hike with varied terrain and lots of points of interest – in short, everything we love. What's more, we did it on a summery Saturday in April and were rewarded with a nice dip in the sea (unfortunately at high tide with pebbles).
our GPS indicated a distance of nearly 22 km (we took a few detours). Be careful when crossing the very busy departmental road and the road just before the Bois de Cise.
Otherwise, it was perfect for us as we didn't know the area, and many thanks to the author.

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Jose Germain
Jose Germain

Overall rating : 5 / 5

Date of your route : Jun 05, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

we know how beautiful the site is

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lesharts
lesharts

Overall rating : 4.7 / 5

Date of your route : May 22, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Can be done on foot or by mountain bike

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Jean-François
Jean-François

Overall rating : 5 / 5

Date of your route : Oct 04, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Hello,
there has been a change to the route at the point where it crosses the departmental road bridge. There is now a footbridge over the cycle path, which avoids having to go up and down the road.

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bernard popiol
bernard popiol

Hello,
Thanks for your comments.
It's true, there is now a footbridge to cross the Bresle, I will amend my description.
I will leave the street names as they are, as they are simply additional information to help people find their way around town if they are unsure.
Thanks again
Enjoy your walks!

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GTIE
GTIE

Overall rating : 4.3 / 5

Date of your route : Sep 11, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Very beautiful hike.
A few details:
(3) ...at the end, 100 metres further on, take the steps... There is now a footbridge opposite which takes you directly under the bridge to the other side of the river and
(4).... Follow the path along the river...
(5) to (9), street names are generally indicated at the other end of the street, which means you have to search for a while before continuing. I can't remember if the castle is visible from a distance and whether it's best not to rely on sight for guidance.

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Hchloe
Hchloe

Overall rating : 2.7 / 5

Date of your route : Mar 30, 2022
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★☆☆ Average
Very busy route : No

I didn't enjoy this hike. There were lots of twists and turns in residential areas and, above all, it was very poorly signposted
Not enough signposts...
I wouldn't do it again.

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Phil80390
Phil80390

Overall rating : 5 / 5

Date of your route : Feb 11, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike in good weather. Passes through unexpected little paths. A wonderful discovery for tourists.

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Do
Do
• Edited:

Overall rating : 4.3 / 5

Date of your route : Aug 19, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful walk. The first part, up to Eu, is well worth the effort and deserves to be better known. The rest is more traditional, but the Bois de Cise is very surprising and offers beautiful views of Ault and the Bay of Somme. The return trip along the coast is very pleasant.
Highly recommended.

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PLUZATER
PLUZATER

Overall rating : 4.7 / 5

Date of your route : Sep 15, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Completed in part over half a day

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bernard popiol
bernard popiol

hello ACVC
I'm interested in the discrepancies you noticed between the description and the map in order to improve the hike.
Thanks
Enjoy your hike

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