The southern tip of the Île d'Oléron, starting from Saint-Trojan

This circular walk starts from the village of Saint-Trojan and takes you through the national forest, along the wild Atlantic coast with the impressive Maumusson sea channel, and around Gatseau Bay. It offers a complete panorama of the southern tip of the Île d'Oléron, far from the cars and crowds of the beaches.
Please note: To be able to walk easily on the hard sand between (4) and (5), it is necessary to check the tide times (see Practical Information section).

Details

1871749
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  • Walking
    Activity: Walking
  • ↔
    Distance: 16.34 km
  • ◔
    Average duration: 4h 45 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 24 m
  • ↘
    Descent: - 24 m

  • ▲
    Highest point: 27 m
  • ▼
    Lowest point: 2 m

Photos

Description of the walk

Park in the car park in the centre of the village opposite the Saint-Trojan market.

(S/E) Cross Boulevard de la Plage and walk past the modern market hall. Head towards the church and turn left onto Rue de la République. Walk past the church (interesting ex-voto in the form of a model boat) and turn into the first street on the right, Rue de Maumusson.
Cross Rue Omer Charlet and climb the five steps opposite. Continue straight on to the terminus of the Saint-Trojan mini train.
Turn right onto the path that enters the forest, passing in front of the station buffet.
Further on, turn left onto the sandy track and follow it for about a hundred metres.
At the first fork, take the narrower path on the right and then right again. Follow the path to reach a gravel path, which is the Soulasserie trail. Take it to the right for a few metres to quickly reach a new crossroads.

(1) Turn left onto a narrow path that enters the forest.
Then turn left onto a path that leads straight up a dune in the forest. The climb is steep but very short.
Follow this poorly marked path that passes between broom and holly growing under the pine trees.
When you reach a wider path, cross it and continue straight ahead on a wider path with sandy ground. You will reach a wide stone track, which is a DCIF track: Défense Contre les Incendies de Forêt (Forest Fire Defence).

(2) Turn left onto this gravel track.
At the barriers, continue straight ahead, leaving the path on the right that leads to the forest house (dead-end path closed to pedestrians). Shortly afterwards, you will come to a path with sandy ground.

(3) Turn right onto this wide path and you will see a sign hanging high up on a tree indicating that horse riders are not allowed. This is the Passe des Bris. Continue straight ahead on this path, ignoring the paths branching off to the left and right.
Further on, cross the track called Boulevard Bonneau (no risk for cars), which cuts across the path at right angles.
Continue straight ahead for a few metres to reach the back of the dune, where the ground becomes softer sand.

(4) Cross the dune without straying from the main path so as not to damage the dune, which protects the forest from the ocean.
Go down to the beach and turn left towards the south. Continue along this beach until you reach the ganivelles (wooden barriers) surrounding the terminus station of the little train.

(5) Climb the dune, go around the tracks on the left and take the path on the left, very close to the back of the dune that descends into the forest. The path is marked by blue dots on the trees.
Leave the blue and red markings that go to the left and continue straight ahead.
You will come to a perpendicular path. Turn right.
Continue straight ahead, following the orange markings. Leave a wide path that branches off to the left under the cypress trees.
The path becomes narrow and comes into view of the sea, reaching the coast facing Gatseau Bay. Enjoy the scenery here.

(6) Turn left, following the narrow-gauge railway line but keeping away from the tracks. Pass a standing stone which is a memorial to the landing on the island of Oléron in April 1945.
Pass the memorial, do not follow the coast but continue under the pine trees towards the wooden structure which is a stop for the little train. Continue straight ahead and you will arrive at the Gatseau beach car park.
Head towards the car park entrance. Pass the entrance to the Ibis hotel and turn right onto the path that runs alongside the hotel fence.
At the end of the path, you will reach Plage du Soleil.

(7) Turn left and follow the path. Continue straight ahead to walk along the Pacaud dyke, which is a tarmac path.

(8) Before the end of the dyke, turn left onto the dirt track indicated by the sign for Marais des Bris, then immediately turn right and go down to cross the wooden bridge. Turn left immediately after the bridge to cross a second bridge.
Turn left onto a third bridge, then follow the path to cross the marsh canals via a fourth, fifth and sixth bridge.
Pass in front of the Maison du Marais with a playground on your left, and take the white path opposite. Cross Boulevard de Gatseau. Continue on the track opposite, which is bordered by a ditch on your right.

(9) Cross this ditch via the first small wooden footbridge and walk between the gardens and houses to reach Rue Surcouf. Turn right to arrive at Allée des Martinets.
When you reach a widening in the road with trees, take the path on the left that starts to the right of a white fence wall belonging to the villa called Vent Sud. Enter the forest, ignoring a path on the right.
You will come to a tarmac cycle path, which you should follow to the left for a few metres.
Take the first sandy path on the right. After the fitness trail beams, continue straight ahead on a narrower path and descend to Boulevard Aristide Briand. Turn right, then left onto Rue Cacaly.
At the end of the street, turn left then right onto Avenue Henri Massé to reach the promenade that runs alongside the small beach.

(10) Turn left towards the village. Pass in front of the seaside villas of Saint-Trojan and enjoy the view of the Oléron viaduct.
At the end of the promenade, continue right on the stone path along the dyke.
When you see the church on your left, go down the wooden steps to return to the starting point (S/E) by crossing the marsh via the footpath.

Waypoints

  1. S/E : km 0 - alt. 3 m - Car park opposite the Saint-Trojean market
  2. 1 : km 1.19 - alt. 14 m - La Soulasserie trail
  3. 2 : km 2.45 - alt. 6 m - DCIF trail
  4. 3 : km 3.51 - alt. 9 m - Start of the Bris pass
  5. 4 : km 4.96 - alt. 6 m - Beach on the wild coast
  6. 5 : km 8.06 - alt. 7 m - Terminus of the Saint Trojan mini train
  7. 6 : km 9.45 - alt. 3 m - Gatseau Bay
  8. 7 : km 10.73 - alt. 6 m - The Sun Beach
  9. 8 : km 12.17 - alt. 4 m - Entrance to the Bris marsh
  10. 9 : km 13.07 - alt. 2 m - Wooden footbridge
  11. 10 : km 14.97 - alt. 5 m - The small beach
  12. S/E : km 16.34 - alt. 3 m - Car park opposite the Saint-Trojean market.

Notes

Please note: (Between 4 and 5) You will be walking on hard sand on the beach. You should plan to walk this section between 3 hours before and 3 hours after low tide, regardless of the tidal coefficient. At high tide with a low tidal coefficient, you will have to walk in soft sand, which is difficult, and at a high tidal coefficient, you will not be able to pass as the water reaches the foot of the dunes.
Tide times
Swimming is dangerous and not recommended on the main beach. There have been several drownings in recent years.

Please respect the dunes.
Toilets at Gatseau beach.
The difficulty is classified as moderate due to the length but very little elevation gain.

Worth a visit

(5) You are facing the Maumusson channel, which is only accessible on foot (or by mini train). This is the narrowest point between the island and the mainland, where the current is very strong and, if the wind is blowing, you will see some beautiful waves breaking. Swimming is strongly discouraged in this very wild area.
(5) If you wish, you can walk all the way around the tip of the island by continuing along the beach after the mini train terminus. This will make the walk longer.
(5) Facing the Maumusson channel, you can see the effects of the ocean's assaults on the dune. At this point, the coastline can recede by several dozen metres per year. The train tracks are often shortened.
(Between 7 and 8) Walk past the buildings that originally formed the American seaplane base during the period 1917-1918. The two long slipways that can be seen were the slipways for this base. These buildings now house a secondary school (CEPMO), an institution for adults with severe disabilities.

Reviews and comments

4.1 / 5
Based on 18 reviews

Reliability of the description
3.9 / 5
Ease of following the route
3.7 / 5
Route interest
4.8 / 5
Diégo17
Diégo17

Overall rating : 4 / 5

Date of your route : Nov 17, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Hello,

A very beautiful hike that combines land and sea.
However, the signposting needs to be reviewed as the route is sometimes very difficult to follow.
Without the Visiorando app, it would be very, very complicated.

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phbizet
phbizet

Overall rating : 4 / 5

Date of your route : Nov 10, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Combine this route with another to extend the enjoyment and duration of your walk.
Problem following the route from the St Trojan marsh.

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lojp17
lojp17

Overall rating : 4 / 5

Date of your route : Sep 28, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant walk through the forest, along the beach and the sea wall on the way back
Thank you for this beautiful route.

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Pierrot680
Pierrot680

Overall rating : 4 / 5

Date of your route : Aug 26, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Easy to follow the route thanks to the GPX track download

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Moreau Carole
Moreau Carole

Great, fantastic! Walk taken on 20 October 2024, but be careful: stage (8) Before the end of the dyke, turn left onto the dirt track indicated by the sign for Marais des Bris, then immediately turn right and go down to cross the wooden bridge. Turn left immediately after the bridge to cross a second bridge. The first wooden bridge no longer exists!

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Hervé A
Hervé A

Overall rating : 5 / 5

Date of your route : Sep 25, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful walk, combining beach (Maumusson, with its rough sea), seaside (Saint-Trojan), and a very beautiful forest. Some very beautiful places to discover.

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JimmyAce
JimmyAce

Overall rating : 4.3 / 5

Date of your route : Oct 03, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Very nice walk, but a bit too many mosquitoes in the undergrowth, so bring mosquito repellent!
Couldn't find the path after point 8, so we stayed on the dyke and rejoined the route further on. Same for point 9 – be careful not to miss it

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jacques.A
jacques.A

Overall rating : 3 / 5

Date of your route : Sep 05, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★☆☆☆☆ Very disappointing
Route interest : ★★★★☆ Good
Very busy route : No

no reliable markings

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NaDiA14
NaDiA14
• Edited:

Overall rating : 3.3 / 5

Date of your route : Apr 24, 2023
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

We did part of the route from the St Trojean Beach Boulevard car park (coastal route)... Marais (detour due to the absence of the footbridge) to Gatseau beach... Return via the same route.
Not many people out and about today during the school holidays.

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Dan-R1
Dan-R1

Overall rating : 3.3 / 5

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

The route is interesting and varied (forest, ocean, straits, marshes) but quite difficult to follow, particularly at point no. 1 where there are no tangible landmarks that can be used in the description and where wild boar trampling makes it difficult to find the "rough track". It is perfectly possible to reach the DCIF trail via a quieter path covering the same distance. In any case, provided you have a GPS, this hike is very enjoyable.

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eriba-17
eriba-17

Overall rating : 5 / 5

Date of your route : Sep 16, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

I am the person who created the hike. I retraced the route yesterday.
PLEASE NOTE: after point 8, it is no longer possible to take the wooden footbridge that leads to the Bris marsh. It no longer exists.
This area has been transformed into a storage area for horses belonging to the neighbouring riding club. This has undoubtedly changed the landscape, transforming the wild marsh into trampled grassland. Not content with destroying the forest paths by trampling the sandy tracks with their hooves, rendering them unsuitable for hiking, they are now attacking the marsh.
So you can't go down to the right into the marsh. Continue straight ahead on the earth embankment. Climb up onto a kind of bird observation kiosk, turn right and you'll find the route again.

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Peter Green
Peter Green

Overall rating : 4.3 / 5

Date of your route : Jan 31, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A very pleasant hike alternating between forest and seaside passages.
Please note that the marsh section is no longer accessible; you will need to go around it, as the bridges mentioned in point 7 of the description (from memory) no longer exist.

A big plus is arriving at the wild coast after leaving the dunes and Gatseau beach, which is magnificent.

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eljoouri
eljoouri

Overall rating : 4 / 5

Date of your route : Sep 30, 2021
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A pleasant and easy hike. The land-sea crossing is magnificent. The description leaves something to be desired in certain parts of the route,
you just need to pay attention. I recommend it.

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aladin5
aladin5

Overall rating : 4.3 / 5

Date of your route : Oct 18, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A lovely walk through woods, forests and along the coast. The map isn't enough; you need guidance from the Visorando app, which I recommend. Aladin

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Heree
Heree

Overall rating : 5 / 5

Date of your route : Oct 04, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

The trail is in the forest. Look out for the American vines clinging to the trees. The arrival at Gatseau beach is magnificent. Continue along the railway tracks and you will arrive at Maumusson beach.

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