Saint-Sébastien route

A route through the countryside and along the banks of the Aulne, the final section of the Nantes–Brest Canal which runs through a channel.
Discover Saint-Sébastien Chapel.

Details

40429
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 6.21 mi
  • ◔
    Average duration: 3h 05 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 295 ft
  • ↘
    Descent: - 285 ft

  • ▲
    Highest point: 269 ft
  • ▼
    Lowest point: 13 ft
  • ⚐ Country: France
  • ⚐ City: Port-Launay (29150)
  • ⚑
    Start/End: N 48.215058° / W 4.073271°
  • ❏
    IGN map(s): Ref. 0517OT, 0518OT
  • Hour-by-hour weather

Photos

Description of the walk

Starting point: Around the Place de l’Église in Port-Launay.

(S/E) With your back to the Place de l’Église, head towards the war memorial then turn right onto Quai Amiral Douguet, along the banks of the River Aulne, which continues as Quai Louis Hais.

(1) Just before the viaduct, by a large white building, turn right onto a grassy path, go under a chain and continue along a track that climbs into the woods. Follow this long, steady climb until you reach a small road.

(2) Turn left and continue uphill. At the first three-way junction, veer left to pass through the village of Lanvaïdic, where you’ll find the small 17th-century Saint-Aubin Chapel.

(3) Continue along a stony path which descends towards a stream and then turns left. It climbs steadily and joins a small country road.

(4) Opposite a house with wooden shutters, turn left onto the road overlooking the Quimper–Landerneau railway line at Pont Saint-Sébastien. After the bridge, turn right and follow this road. Walk past the greenhouses of the Kergadalen Agricultural Training Centre on your right.

(5) Carry on straight ahead at the crossroads with a carved cross and continue on to the hamlet of Saint-Sébastien and its beautiful 16th-century chapel (an ideal spot for a break). Take a short detour to the modest fountain situated about 100 metres further down

(6) Continue downhill: pass the farms at Le Rest and Rozavel, and the Lézaon equestrian centre.

(7) After a solitary conifer on the right, turn right onto a path between the fields and head towards the banks of the Aulne.

(8) Turn left at the gate and follow the path through the reedbed. It leads to the Guily-Glas maritime lock.

(9) Continue along the Aulne, passing under the viaduct, and follow the route taken on the way out to reach the church square (S/E).

Waypoints

  1. S/E : mi 0 - alt. 20 ft - Port-Launay church square
  2. 1 : mi 0.8 - alt. 16 ft - Before the viaduct, take the lane on the right
  3. 2 : mi 1.22 - alt. 217 ft - Turn left onto the road
  4. 3 : mi 1.4 - alt. 269 ft - Saint-Aubin Chapel.
  5. 4 : mi 2.07 - alt. 240 ft - Turn left towards the bridge over the railway line.
  6. 5 : mi 2.45 - alt. 217 ft - Crossroads with a cross
  7. 6 : mi 2.78 - alt. 187 ft - Saint-Sébastien Chapel
  8. 7 : mi 3.75 - alt. 56 ft - Path on the right between the fields
  9. 8 : mi 3.95 - alt. 13 ft - To the left, along the river (reed bed) - Aulne (fleuve)
  10. 9 : mi 5.02 - alt. 16 ft - Guily Glaz maritime lock
  11. S/E : mi 6.21 - alt. 20 ft - Port-Launay church square

Notes

Toilets at (S/E) and near (9)
(8) This section may be muddy in winter.

Worth a visit

Reviews and comments

4.5 / 5
Based on 16 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.6 / 5
Route interest
4.4 / 5
Caroline LD 29
Caroline LD 29

Overall rating : 5 / 5

Date of your route : Aug 29, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A brilliant route – we did this one starting from Châteaulin, completing a 20km hike – it was absolutely perfect!

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JEAN CLAUDE FOR*
JEAN CLAUDE FOR*

Overall rating : 4 / 5

Date of your route : Dec 29, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

easy route

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User 12033972

Overall rating : 4.7 / 5

Date of your route : Dec 11, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Departure at 1:30 pm. Grey weather.
There are two of us.
Paper maps and GPS.
The route is easy to follow, with no obstacles.
We arrive at Saint Sebastian's Chapel. It is closed.
We admire the calvary and its "bubonic" base; the pedestal features carved medallions: real "emojis" before their time!
The descent to the canal is easy.
We come across the remains of the very first lock, abandoned in favour of the one at Guilly Glas.
At the end of the hike, there is a magnificent view of Port L'Aulnay nestled at the end of a bend in the canal.
We return to our cars at 4:15 p.m.
We haven't seen anyone...

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Pj9374
Pj9374

Overall rating : 4.7 / 5

Date of your route : Sep 13, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A short, easy, bucolic walk.
Unfortunately, we were unable to visit Saint Sebastian's Chapel as it is currently undergoing renovation.

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Ubrane
Ubrane

Overall rating : 4.3 / 5

Date of your route : Sep 25, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

a very interesting hike with beautiful views, and we were lucky that Saint Sebastian's Chapel was open. It is magnificent

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Le Bris Denise
Le Bris Denise

Overall rating : 4.3 / 5

Date of your route : May 15, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Hello, everyone. An interesting route due to the varied terrain: part of it runs along the Aune river, another part is on a small road, and another part is in the woods with a few hills. Passable when others are less so.

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Les pommiers
Les pommiers

Overall rating : 4.3 / 5

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

It would be advisable to specify "Turn right 50 metres after the conifer tree" at 7
A very beautiful hike

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cmadec29
cmadec29

Overall rating : 4.7 / 5

Date of your route : Nov 14, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

An interesting route despite a long stretch of road between points 4 and 7. At this time of year, the road isn't too busy, so the walk was very pleasant. It's a shame that the chapels are closed, but that's not specific to this route. At the start, we had to search a little for the path in the woods because the "white" building is set back from the road and not very visible from a distance. In the end, you just need to take the last grassy entrance before the viaduct. We really liked the isolated conifer and hope that it won't be cut down one day. The path from point 7 is easy to find because it extends from another path on the left. All in all, it was a very pleasant route combining paths through the woods, picturesque hamlets and a riverside walk with boats and beautiful reed beds.

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Cat29
Cat29
• Edited:

Overall rating : 5 / 5

Date of your route : May 08, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant walk that alternates between the banks of the canal, the banks of the Aulne Maritime river and country lanes, passing by chapels. No particular difficulty.

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FLOCH
FLOCH ★

Thank you for this advice.
I also had this opportunity once during restoration work: a wonderful discovery.
Best regards

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yvonnelegall
yvonnelegall

Overall rating : 4.7 / 5

Date of your route : Jan 02, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A lovely walk along the banks of the canal. St Sebastian's Chapel was open, so we visited it
with the permission of the worker who was there: a very beautiful chapel.
At the end, we went to see the beautiful nativity scene in Port-Launay.
Thank you for this route

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LLP
LLP

Overall rating : 5 / 5

Date of your route : Aug 14, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very pleasant and varied route (towpath, tree canopy, panoramic views, chapels, lock, rose garden) despite its average distance. A slight climb in the first part, followed by a gentle descent and flat terrain along the banks of the Alune. I recommend it.

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Jercardon
Jercardon

Overall rating : 4.3 / 5

Date of your route : Apr 22, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

The hike is very pleasant; I use it as a running route. The section that runs alongside the alder trees is very pleasant, calm and relaxing.

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gazok54
gazok54 ★

Thank you, oriane2g.
You say that you didn't encounter any difficulties with the description and the route, yet you rate the route as "moderate". Is this a mistake?

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oriane2g
oriane2g

Overall rating : 4.3 / 5

Date of your route : Jan 05, 2016
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good

A beautiful route, with paths, small roads and varied landscapes. As usual, I followed both the written directions and the GPS route on my mobile phone, and with the help of both, I had no difficulty. Beautiful chapels along the way and a different view of the Aulne. If you plan to do this walk in winter, make sure you wear good walking shoes as there is mud in places. Overall, a very beautiful hike.

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