Route of the canalised Aulne river starting from Pont-Coblant

After a leisurely walk along the Nantes-Brest canal, you will climb a little higher into the countryside, where you will have a bird's eye view of the Aulne, the Montagnes Noires and the Monts d'Arrée.
You will return to your starting point after walking along small country roads and sunken lanes.

Details

115430
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  • Walking
    Activity: Walking
  • ↔
    Distance: 11.59 km
  • ◔
    Average duration: 3h 45 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 142 m
  • ↘
    Descent: - 133 m

  • ▲
    Highest point: 96 m
  • ▼
    Lowest point: 19 m
  • ⚐ Country: France
  • ⚐ District: Gouézec (29190)
  • ⚑
    Start/End: N 48.192125° / W 3.983534°
  • ❏
    IGN map(s): Ref. 0517OT, 0618OT
  • Hour-by-hour weather

Photos

Description of the walk

Pont-Coblant is located about 5 km from Pleyben on the D785 towards Briec.

Yellow markings

(S/E) Car park near the Auberge du Poisson Blanc.
Head west, follow the canalised Aulne river, pass the water sports centre and cross the D785 carefully at the bridge

(1). Continue along the towpath for about 5 km. Old slate quarries line the canal.

(2) Pass the first lock, Stéréon and its beautiful lock keeper's house. Continue to the second lock. On the opposite bank, you can see the village of Vieux-Bourg with its church without a spire, which is thought to date back to the 18th century. Pass the Coat Pont lock and about 500 m further on, you will find picnic tables on the right: why not take a short break?

No markings

(3) Ignore the paths that branch off to the right and continue along the towpath.

(4) With Maner Coz in view on the hilltop and at a ruined building, turn onto a path that climbs to the right into a wood at a place called Meilh Treziguidy. On your left, you will pass the ruins of a relatively large old house. Follow this uphill path to reach a road, which you will follow to the right. Once you have passed Vérouti, you will be on the edge of the N164 heading towards Pleyben.

(5) At the crossroads, leave the bridge over the N164 on your left and turn right to follow the road downhill. Ignore the roads leading to farms on both your right and left and continue to the next three-way junction after passing the entrance to the Kerhonan farm (Kerc'honan) on your right.

(6) Turn right onto the road towards Linlouet, pass this hamlet on your right and continue. A little further on, pass the road leading to the farm.

Yellow markings

Continue straight ahead until you reach the next crossroads. 

(7) Take the dirt track on the left just before the high-voltage power line crosses the road and which quickly turns right (old sign) to run alongside a field (beautiful views of the Monts d'Arrée to the north and the Montagnes Noires to the west). Continue along this farm track, which is circular and leads to Pennoc'h farm (there is a tricky muddy section due to livestock crossing the track for about 400 metres before the farm).

(8) At the farm, turn right and follow the path down into the woods, then carefully enter a passageway in the woods. Walk along a meadow until you reach a cypress hedge.

(9) Go around Stéréon farm and climb up to the left (old sign) onto the farm track, which then turns right. Follow it for about 500 metres.

(10) Take a grassy path and keep the power line on your left. This poorly maintained path descends steeply to join the D785. Cross carefully at the pedestrian crossing and continue straight ahead to return to the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 24 m - Car park near the Auberge du Poisson Blanc
  2. 1 : km 0.22 - alt. 27 m - Crossing the D785 and start of the towpath
  3. 2 : km 1.05 - alt. 24 m - Stéréon lock
  4. 3 : km 4.36 - alt. 20 m - Picnic tables
  5. 4 : km 5.28 - alt. 21 m - Path ascending to the right into the woods
  6. 5 : km 6.07 - alt. 80 m - Turn right onto the downhill road.
  7. 6 : km 8.29 - alt. 71 m - Climb to the right.
  8. 7 : km 9.2 - alt. 76 m - Dirt track on the left
  9. 8 : km 10.19 - alt. 72 m - Turn right, then take the path down into the woods.
  10. 9 : km 10.7 - alt. 35 m - Farm track on the left
  11. 10 : km 11.45 - alt. 33 m - Descent via a grassy path.
  12. S/E : km 11.58 - alt. 24 m - Car park near the Auberge du Poisson Blanc

Notes

Wear hiking boots.

This hike has two distinct parts:
- The first part is about 5.5 km long, easy and flat, along the banks of the canalised Aulne river.
- The second part is hilly, through the countryside along paths and small roads. On this route,
there is a tricky muddy section of about 300 m that is difficult to avoid. This path is regularly used
by a herd, which explains the condition of the passage (a possible solution is to walk along the top of the woods, but this is not very easy either).

For this reason, I prefer to classify it as moderately difficult despite the slight elevation gain.

In the second part of the route, there are a few remains of old yellow markings and a few isolated signs that are still legible.

Worth a visit

Pont-Coblant:

A former slate quarry that prospered in the 19th and first half of the 20th century: three quarries employed 300 workers. Slate quarrying came to an end in 1955 due to high operating costs.

However, the hamlet of Pont Coblant, located on the banks of the Aulne, continues to develop in an exceptional, peaceful and green setting, ideal for nature and sports tourism, fishing and walking. The Nautical Centre, with a capacity of 52 beds, offers activities for all ages throughout the year. (Canoeing and kayaking, hiking, horse riding and mountain biking, archery, fitness trails, fishing, yoga and fitness courses, seminars). A two-star campsite offers 70 pitches in a bucolic setting that is very popular with fishermen and families. The hamlet has commercial facilities (inn, grocery store, crêperie, bar, tobacconist).

Reviews and comments

4.6 / 5
Based on 7 reviews

Reliability of the description
4.7 / 5
Ease of following the route
4.9 / 5
Route interest
4.3 / 5
mako29
mako29

Overall rating : 5 / 5

Date of your route : Mar 22, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

We made the most of the lovely Breton sunshine to explore a small section of the canal. The route is very well described. The first part is easy, then comes the climb, which gets your heart rate up a bit. This is followed by a stretch on the road – there’s no choice, but it’s fine as it’s not too busy. Then there’s the loop through the countryside and the descent towards the canal through the woods. The walk took 2 hours and 21 minutes. Thank you for this discovery.

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FLOCH
FLOCH ★

Thank you for your review.

I am sorry that you were unable to complete the entire route.
I had noted a tricky section before the farm due to passing herds, but it was quite a short stretch.
The rest of the route was fine.

Best regards.

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mcplomeur
mcplomeur

Overall rating : 5 / 5

Date of your route : Feb 17, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

We chose this hike, which allows you to gain a little height before following the Aulne, doing it in the opposite direction.
The thick, greasy mud, which was very present (not just in a few places) at points 7, 8 and 9, forced us to abandon the hike.
This was surprising because these sections are high up... and moreover, the banks of the Aulne, even the towpath, were passable.
So check before you set off.
It's a shame because this hike looked superb!

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taq29
taq29

Overall rating : 4.7 / 5

Date of your route : Apr 11, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Hike done this afternoon. The arrival at the car park is a bit tumultuous! It's snowing, hailing and raining to finish. After 10 minutes, I can finally start the walk, which will be done in more than decent weather and even finished in the sunshine!
We know the route well, as we live nearby. The first part is as described and very pleasant. After a short climb, we have the road to ourselves, as it is closed to cars. In the valley, the road is "broken up"!!! Before arriving at Pont-Coblant, the section near the farm is still muddy and tricky, but not difficult, apart from all the ropes across the path. Cows have priority here...
It took us 2½ hours to complete this walk and we enjoyed the view on the way back. Our only encounters were several pairs of ducks, pigeons and a... quad bike!!!
Thank you for the walk.

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MADOLEON29
MADOLEON29

Overall rating : 4 / 5

Date of your route : May 24, 2019
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

No major difficulties, nice ride along the Aulne, peaceful, the water jet bike works well, the explanations about the slate quarries next to Sainte Barbe Chapel are very clear, with commentary from the site's volunteer association.

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FLOCH
FLOCH ★

Thank you for your comment and your remark.
I have modified this passage based on the information you provided.
Comments from other hikers are always useful for improving descriptions.

Best regards

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jaimerandonner
jaimerandonner

Overall rating : 4 / 5

Date of your route : Jul 23, 2018
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average

Hello

We encountered a problem with point 6 (second part of the sentence); in fact, it would suffice to indicate "turn onto the dirt road on the left just before the high-voltage line crosses the road"; the reference to the farm "Kernevez ti virrien" confused us because this sign is located well after the road where we have to turn.

NO MUD

A bit long on the road (point 5)

It was still a beautiful walk, very well signposted except for the point mentioned above.
Thank you

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Roger Flao
Roger Flao

Overall rating : 5 / 5

Date of your route : Aug 23, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

We had the pleasure of completing this beautiful route in good weather.
It's a shame that the end of the route, just before descending to Pont Coblant, is not maintained at all. The signposted and marked hiking trail is blocked by fence wires and very tall grass and brambles. We had to walk through a pasture (occupied by cattle...) for about a hundred metres.
The start along the canal is relaxing and offers beautiful views.
Thank you for suggesting this route.
Roger and Marie-Jeanne.

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pesket29
pesket29

Overall rating : 4.7 / 5

Date of your route : Aug 02, 2015
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A pleasant hike in the sunshine, we were lucky to enjoy dry weather this summer and therefore didn't have to contend with muddy conditions. Indeed, on arrival, the path leading downhill is very poorly maintained.
Many thanks to Floch for the route, beautiful panoramas, relaxing, peaceful sites...

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