Audubon Marsh Circular: Arche du Dareau - Etang-Bernard

This hike covers part of the Marais Audubon, a wetland that is part of the estuarine marshes. This area is a sanctuary for many species of birds, including storks, herons, egrets, ducks, harriers... An area of extensive cattle farming, it is also home to other less desirable species, such as nutria.
This circular route of about 10km runs almost exclusively along roads – some of which are flood-prone – but with very little traffic.

Details

181140
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 9.85 km
  • ◔
    Average duration: 2h 50 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 9 m
  • ↘
    Descent: - 9 m

  • ▲
    Highest point: 12 m
  • ▼
    Lowest point: 1 m

Photos

Description of the walk

At a place called l'Arche du Dareau, there is a small car park on the left, opposite Rue de la Bourdinière, which is the starting point.

(S/E) Continue along Rue de la Sensive (north-west).

(1) Pass the first canal and its small shipyard, which is still in operation, then turn right at the fork. Follow the road to the first intersection.

(2) Turn right, then take the first left after about 600 metres.

(3) At the next crossroads, turn right. Pass through La Chalandière and you will come to another crossroads.

(4) Turn right. Ignore the small road leading to Le Ruaud on the right and pass through Le Cadoret. Continue until you reach the "Give Way" sign.

(5) Turn right and continue straight ahead for about 1.5 km until you reach the stop sign.

(6) Turn right to enter the hamlet of Étang Bernard, which rises just a few metres above the marsh. After 100 metres, at a fork, turn right again onto Rue du Château. After 100 metres, take the small road that goes up to the left (Chemin de la Grimaudière), then follow it until you return to Route des Pélerins at the stop sign.

(7) Take this road on the right. Leave Étang Bernard and, at the next fork, take the road on the right for 300 metres.

(8) Take the path on the right. If this path is too muddy, which can happen, continue along the road and turn right at the next junction.

(9) Back on the road at Mortier des Noues, turn right and continue to the junction with Rue de la Bourdinière.

(10) Turn left and return to the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 3 m - Arche du Dareau car park
  2. 1 : km 0.29 - alt. 5 m - Small shipyard
  3. 2 : km 1.91 - alt. 1 m - Crossroads
  4. 3 : km 3.28 - alt. 1 m - Crossroads
  5. 4 : km 4.23 - alt. 4 m - At the crossroads, turn right.
  6. 5 : km 4.86 - alt. 4 m - At the crossroads, turn right.
  7. 6 : km 5.98 - alt. 9 m - Etang-Bernard
  8. 7 : km 6.45 - alt. 9 m - At the stop sign, turn right.
  9. 8 : km 7.46 - alt. 8 m - Leave the road and take the path on the right.
  10. 9 : km 7.98 - alt. 4 m - Le Mortier de >Nous, take the road on the right
  11. 10 : km 8.85 - alt. 8 m - Rue de la Bourdinière junction, on the left
  12. S/E : km 9.85 - alt. 3 m - Arche du Dareau car park

Notes

To reach the starting point, from Place de la Mairie, turn left onto Rue J. Evin towards the post office, then right onto Rue H. Gautier. At the roundabout, turn left onto Boulevard Blancho for 500 metres, then right onto Rue Arsene Leloup. At the roundabout, go straight ahead and then immediately turn left onto Rue des Chardonnerets. Follow this road until you leave Coueron via Rue de la Sensive.
As mentioned in the introduction, this wetland area is partially flood-prone. This can happen frequently in winter after heavy rainfall, and depending on the tide...

Worth a visit

Bird watching: remember to bring your binoculars.

Reviews and comments

4.1 / 5
Based on 17 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4.1 / 5
Route interest
3.8 / 5
jfm44
jfm44

Overall rating : 5 / 5

Date of your route : Jan 12, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Winter hike under very overcast skies, but lots of birds: grey heron, little egret, great egret (including two displaying or fighting!), storks of course, etc.

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Yogui44
Yogui44
• Edited:

Overall rating : 4.7 / 5

Date of your route : Sep 02, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Hiking in early September, and already a flooded road... unbelievable (2 to 3 cm)
I extended this route to reduce the amount of tarmac (96 to 78) with an extra 2.5 km on some very pleasant little paths
Good quality GPX track.

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User 11991900

Overall rating : 4.3 / 5

Date of your route : Aug 12, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : No

I found the first half of the route more interesting than the second, as it allows you to really discover the marsh.
The route is almost entirely on paved roads, but this is the only way to get to this marshland, where there are hardly any paths and most of them are dead ends. Cars are rare, especially in the first half, as there are no houses and the roads are used to access farmland. There are many more cyclists than cars.

With reference to the previous comment: this is not a signposted route; the few signs you will see are for another route in the municipality of St-Etienne-de-Montluc (Etang Bernard route)

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Castoriadis
Castoriadis

Overall rating : 1 / 5

Date of your route : Mar 07, 2025
Reliability of the description : ★☆☆☆☆ Very disappointing
Ease of following the route : ★☆☆☆☆ Very disappointing
Route interest : ★☆☆☆☆ Very disappointing
Very busy route : No

The route is entirely on the road, which makes it difficult to walk. The prohibitions marked by yellow crosses are not in the right place, and the signposting encourages you to stray from the route, which can be clearly seen on Google Maps. The result: 10 km of road and numerous errors (or acts of malicious property owners?) in the signposting.

It's a shame because the area could be pleasant if it were trails rather than very long, straight stretches of road.

No interest whatsoever.
Bruno

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Sylvieoueb
Sylvieoueb
• Edited:

Overall rating : 3 / 5

Date of your route : Nov 05, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★☆☆☆☆ Very disappointing
Very busy route : No

When we scouted this hike before offering it to our walking group, we already had difficulty finding the car park, which was clearly marked on the app but was actually more like a roadside lay-by.
The first part, about 5 km, is through the marsh, on small tarmac roads. This means you can observe the marsh without getting wet.
However, the rest of the route, except for a very small section, also continues on tarmac, this time without any view of the marshes and, frankly, without much interest.

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Captainfj
Captainfj
• Edited:

Overall rating : 5 / 5

Date of your route : Nov 27, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant hike, best done outside of the dry season to enjoy all the little canals full of water, which are what make the landscape so interesting. Of course, there are no storks in November, but there are lots of herons and stork nests on the electricity poles.
We were able to use the suggested sunken path, which wasn't too muddy considering the rain and the season!

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plidenantes
plidenantes

Overall rating : 4 / 5

Date of your route : May 13, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Very disappointing. Road, road, road, very monotonous. The end from Étang-Bernard is very long... One would hope that the only section of path offered would be exciting, but it is disastrous. Even in dry weather, it is a quagmire. It is not certain that continuing along the road instead of cutting across the path will take longer!

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paulmasters
paulmasters

Overall rating : 3.7 / 5

Date of your route : Oct 09, 2021
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

An easy but charming hike. We had our doubts before setting off, as most of the route is along roads, but in two hours we saw fewer than twenty vehicles. We even sat down on the tarmac at one point to eat a sandwich, because the ground was wet.
For the walk: luckily I had brought my binoculars, because even in October we saw a stork in the vast meadows, and white herons (not to mention various types of egrets, geese and ducks). On either side, the land was flat and prone to flooding, and the small roads were the only way to get around. But be careful, because there are many (roads), and they all look alike, and even though I am not a beginner at navigation, I realised at one point that I had made a mistake and shortened our route (by going directly from Île Perdue to Étang Bernard, without passing through points 3, 4 and 5!).

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yannherbert
yannherbert

Overall rating : 4.3 / 5

Date of your route : Apr 26, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A very easy and pleasant walk, especially in the first part for bird watching. A stork's nest on section 3/4.
Please note that section 8/9 is very difficult to walk on, as the sunken path is very wet and slippery, even in very dry weather.

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adèle44
adèle44

Overall rating : 4.3 / 5

Date of your route : May 20, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : No

We enjoyed seeing the storks and a heron, but no other animals. As this route is on roads, I think it would be better to do it by bike.

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Pathug
Pathug

Overall rating : 4 / 5

Date of your route : Sep 09, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

There are no signs on site. A map is not enough. You must have a telephone.
We loved the wildlife.

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henri57
henri57 ★

Hello,

Thank you for taking the time to give your opinion.

By "route on map", we mean assessing how accurately the route shown on the map corresponds to the actual terrain.
Did the route cause any problems?

See you soon

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oretiere
oretiere

Overall rating : 3.7 / 5

Date of your route : Apr 16, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good

A stroll among the storks and the marsh canals; very peaceful.

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emmanuel perrot
emmanuel perrot

Overall rating : 4.7 / 5

Date of your route : Feb 27, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A pleasant hike in its first part for those seeking closer contact with nature (watching storks, herons, little egrets, etc.). However, in my opinion, it quickly loses its appeal halfway through, especially as the paved section quickly becomes tedious... The only small sunken path is almost impassable due to mud and puddles, and you literally have to hold on to branches ... Best to do this hike again in spring to observe life around the water sources.

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Kristalinette
Kristalinette

Overall rating : 5 / 5

Date of your route : Nov 12, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very beautiful, well-detailed hike. Some road walking but little traffic. Very pleasant.

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