On the banks of the Leff and Trieux rivers

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A sometimes uneven walk through the undergrowth along two Breton rivers, offering a different view depending on the tide level.

Details

n°123435
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  • Walking
    Activity: Walking
  • ↔
    Distance: 14.23 km
  • ◔
    Average duration: 4h 30 
  • ▲
    Difficulty: Moderate
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 160 m
  • ↘
    Descent: - 160 m
  • ▲
    Highest point: 96 m
  • ▼
    Lowest point: 1 m
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Photos

Second wreck
Along the Trieux
Railway bridge
The shipwreck

Description of the walk

Depart from the Town Hall Square, opposite the church.

(S/E) Turn left onto Rue de l'Église towards "Pradigou". At the crossroads, turn right, leaving the calvary on your left, towards "Kerbleust". In "Kerbleust", continue along the road on the left, which becomes a path.

GR®34Ared and white markings.

(1) You will reach theGR®34A, which you will take by taking the path on the left. Continue on the wide path, which bends to the left and then to the right at a right angle. You will reach a small road; take it to the right at Kerlégan. After passing a field on your right, in a left-hand bend, continue straight ahead, taking a smaller path marked "Pontrieux"..

(2) At the fork, turn right and follow the sign for "Pontrieux". After an uphill climb, you will come to another fork where you turn right to descend towards the river. After following the river along a paved path, the trail branches off to the left, climbing uphill and joining a wide track.

(3) Turn right and head down towards the Leff. Pass under the small railway bridge and, when you reach a shipwreck, turn left.
The path climbs, makes a hairpin bend to the right and then continues down a staircase to the banks of the Trieux.
Turn right to admire the confluence of the two rivers.

(4) Retrace your steps and continue along the river.

(5) There is a picnic table where you can rest. Follow the Trieux to the port of Kerblouc'h.

(6) Leave the Trieux on your left via Rue Goas Vilinic, pass under the railway bridge and take the first street on your right. After a 70 km/h speed limit sign, you will see a house numbered 4. In front of this house, take the path on the left and then turn right, following the sign for the mountain biking and horse riding route.
The path turns left then right and joins another path. Continue on the left towards a relay antenna tower.

No markings

(7) TheGR®34Aturns right (church bell tower on the horizon in line with the path), ignore it and continue straight ahead, then immediately right.

(8) Cross thefirst road and take thesecond on the right, then immediately turn left (D21). Pass Kerlaëric and reach the Kergozou sign.

(9) Turn left before a house with a varnished wooden mill between it and the road. At the crossroads, continue straight ahead towards a farm shed. The stony path becomes a grassy path which continues straight ahead and after the shed, take the path on the right.
At the end of the path, turn left and, 100 metres further on, this path branches off to the right.

(10) Turn right and ten metres further on, turn left (signposted "Retour grande boucle VTT"), continue straight ahead on the path to the end.

(11) Take the road on the left to join the D15. Follow it to the right and head towards the town centre and the Place de la Mairie (S/E).

Waypoints

  1. S/E : km 0 - alt. 69 m - Town Hall Square opposite the church
  2. 1 : km 1.87 - alt. 54 m - Junction with the GR 34A
  3. 2 : km 3.36 - alt. 31 m - Signpost "Pontrieux" Towards - Leff (rivière)
  4. 3 : km 5.62 - alt. 45 m - Straw wall
  5. 4 : km 6.35 - alt. 7 m - Confluence of the Leff and the - Trieux (fleuve)
  6. 5 : km 7.2 - alt. 6 m - Picnic area
  7. 6 : km 8.15 - alt. 6 m - Dam and lock on the Trieux
  8. 7 : km 10.03 - alt. 75 m - Leave the GR 84A
  9. 8 : km 10.47 - alt. 72 m - Direct return via the D15.
  10. 9 : km 11.44 - alt. 90 m - Turn left before the wooden mill.
  11. 10 : km 12.76 - alt. 94 m - First turn right then left
  12. 11 : km 13.66 - alt. 86 m - At the end of the path, turn left.
  13. S/E : km 14.23 - alt. 69 m - Town Hall Square opposite the church

Notes

From (1) to (3), some sections are difficult, making the route dangerous for young children and elderly people.

This hike will be much more enjoyable if the tide is high, as the level of these two waterways varies with the tide, and at high tide the muddy areas are covered.

 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.

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Reviews and comments

4.5 / 5
Based on 13 reviews
Reliability of the description
4.5 / 5
Ease of following the route
4.4 / 5
Route interest
4.5 / 5
Aldodekerpuns
Aldodekerpuns

Overall rating : 4.7 / 5

Date of your route : Mar 05, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

We changed the route between No. 1 and No. 2, taking part of the mountain bike route and continuing along the small (black) path shown on the map that runs alongside the Leff (muddy due to high tides) but very pretty. Between No. 2 and No. 3, there is a small PR sign with a picture of the chapel to access the Maudez chapel. We had a picnic and then took the same path back to enjoy the trail along the Leff.
The rest of the route was a beautiful hike, with gentle slopes and not too much tarmac.

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domivasseur2935
domivasseur2935

Overall rating : 4.3 / 5

Date of your route : Apr 20, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

I know we shouldn't talk about signposting, but it would have been very useful in sections 1 to 3, as some trees fell during the storm and the paths are partially obscured/altered. Does the GR34A still exist?
At point 6, the speed limit sign has been changed to "50".
There are two benches at point 4 if you prefer to picnic at the confluence without waiting for point 5 (two picnic tables).
If you're feeling energetic, you can push on to Pontrieux after the lock.
A very beautiful hike. Some elevation gain.

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MORAINVILLIERS(SEINE ET OISE)
MORAINVILLIERS(SEINE ET OISE)

Overall rating : 3.7 / 5

Date of your route : Aug 12, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Some signs have disappeared from the route, but the trail remains very attractive; it is best to do it when the tide is rising (but not too high) so that you can admire the "fryandour".
Afterwards, take a trip to Lanleff to see the temple.
Enjoy your walk.

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Rima54
Rima54

Overall rating : 5 / 5

Date of your route : Mar 17, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful 14km circular, especially the first half, which runs through woods and along the riverbank.

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rando2259
rando2259

Overall rating : 4.7 / 5

Date of your route : Oct 19, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

Very good description.
We modified it for our group by removing the difficult section where you reach the river. We caught up with the GR 34A (which is now a GRP) using the local PR.
Another path at the end, near Guinolez, allowed us to take a shortcut.

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Delfi91
Delfi91

Overall rating : 5 / 5

Date of your route : Sep 19, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Great hike. Unfortunately, we did it at low tide, and it must be much better at high tide, but we had a specific day to do it.

If you can, make sure you visit the Frynaudour Bridge (a metal lattice bridge designed by Gustave Eiffel in 1893) near the junction between the Trieux and Leff rivers, where you can see the old Trieux steam train pass by (it passes around 12:00 in July and August and around 10:30-10:45 in June and early September) - check to see if the train is running on the day you are hiking.

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Randodouze
Randodouze
• Edited:

Overall rating : 5 / 5

Date of your route : Aug 08, 2018
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

We really enjoyed this hike, which was very varied, not always easy, but superb.
.
Well done to the person(s) who wrote the description, which was perfect, with all the important details included (for example, the number 4 on a house opposite which the path started... I didn't take note of the number 4, and we had to turn back to finally find the famous number 4 and the path opposite).

The route is also very precise.
Well done again and thank you.

Randodouze

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jc22200
jc22200

Overall rating : 4.7 / 5

Date of your route : Jan 07, 2018
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

I didn't follow the entire route; I adapted it to suit my preferences. However, it was a very beautiful walk with some stunning views. I highly recommend it.

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actreb
actreb

Overall rating : 4 / 5

Date of your route : Jun 05, 2017
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

A pleasant route, though it may be difficult to walk at high tide when the tidal range is high (risk of flooding). The GR markings are sometimes a little unclear, so be sure to take a map and pay attention. From point 7, it's worth taking a detour to Pontrieux, a charming little town with a pleasant harbour.

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R BRIEND
R BRIEND

Overall rating : 4.3 / 5

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

A route that is worth a detour through the city centre.

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ericcouty
ericcouty

Overall rating : 4.7 / 5

Date of your route : Sep 06, 2016
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

Very pretty parish-specific to Brittany hike... through woods, past ponds, starting in town...

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chevalier78
chevalier78

Overall rating : 3.7 / 5

Date of your route : Aug 30, 2016
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average

At point 1, there is a slight deviation to be made following a fallen tree. Follow the GR a little further down, which then climbs back up (purple line on the map).

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sergioplus
sergioplus

Overall rating : 4.3 / 5

Date of your route : Jun 26, 2016
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

The beginning lacks precision. It should have been indicated at number 1 to take the path on the left marked 'VTT' (mountain biking).

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