The Trieux and its tributary, the Leff: between sea and countryside

de fr

This hike has three parts, each offering a different landscape. First, there is a long walk along the Trieux. This leads to the remarkable site of Frynaudour (confluence, blue viaduct, wreck).
The trail then follows the banks of the Leff with a few slopes. Finally, a walk along sunken paths and small roads will take you to the Trieux.

Details

n°23066655
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 8.85 km
  • ◔
    Average duration: 2h 55 
  • ▲
    Difficulty: Moderate
  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 140 m
  • ↘
    Descent: - 142 m
  • ▲
    Highest point: 72 m
  • ▼
    Lowest point: 3 m
Downloads
Open in the mobile app
Download GPX GPX
Download PDF PDF

Photos

Gunnera near a pond
Descent towards the Leff
Railway line with Frynaudour viaduct
Stairs to the railway line

Description of the walk

Park in the small car park at the end of the port of Goas Vilinic.

(S/E) Leave the car park and take the towpath, which is completely flat and partly shaded.

(1) Ignore the first turn on the right, which will be the return route, and continue along the towpath almost to its end.

(2) Leave the towpath and turn right into the undergrowth towards Lanleff. Take the stairs, then turn left towards the riverbank and head for the Frynaudour railway viaduct with its wreck.

(3) Pass under the arch of the viaduct and take the wide path uphill to the first fork in the road.

(4) Turn left, following theGR®34Asigns. The grassy path descends towards the Leff in a steep-sided valley lined with tall ferns.

(5) Keep to the left, following theGR®34Asigns, and follow this steep path which follows the river, sometimes descending to the riverbank, then moving away from it.

(6) Keep well to the left, as the signposting is insufficient in this section, following the GPS pointer closely. After crossing a stream, go back up and take a wide, stony path on the right towards Kerlegan.

(7) Leave theGR®34Aand turn right towards Feunten Veur. At the end of the tarmac road, first turn right then left and continue along the grassy path. You will reach the Chapel of Saint-Maudez.

(8) Pass in front of the building and follow the road on the left, then continue to the right after the houses. Keep left to reach the hamlet of Bojoly and follow the road to the left. Reach the third crossroads after a very steep straight road.

(9) At the bottom of the descent, turn right at a right angle onto a descending gravel path, pass under the railway line and rejoin the towpath.

(1) Turn left and follow the towpath in the opposite direction to the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 7 m - Small car park (3 or 4 spaces) on the edge of the - Trieux (fleuve)
  2. 1 : km 1.1 - alt. 6 m - Crossroads of the circular
  3. 2 : km 1.81 - alt. 6 m - Junction with the towpath/GR34A
  4. 3 : km 2.05 - alt. 10 m - Frynaudour Viaduct. Confluence of the Trieux - Leff (rivière)
  5. 4 : km 2.47 - alt. 45 m - Grassy path
  6. 5 : km 3 - alt. 6 m - Banks of the Leff
  7. 6 : km 4.72 - alt. 30 m - GR 34A junction
  8. 7 : km 5.2 - alt. 61 m - GR 34 junction/path
  9. 8 : km 6.57 - alt. 57 m - Chapel of Saint Maudez
  10. 9 : km 7.62 - alt. 15 m - Junction with the road/downhill path
  11. S/E : km 8.85 - alt. 7 m - Car park at the start

Notes

This hike has a few exposed sections between points (4) and (6) (path along the riverbank overlooking the river).
It is best to hike at high tide, as half of the route runs along the water's edge, making for stunning scenery.

Worth a visit

Right from the start, you will feel completely transported as you take the towpath, which is easy to walk on for two kilometres of flat terrain.
The confluence at Frynaudour is spanned by a blue viaduct on the Guingamp-Paimpol TER line.
At its foot lodges the large wreck of a wooden boat.
The route passes in front of the Chapel of Saint-Maudez.

Reviews and comments

4.7 / 5
Based on 9 reviews
Reliability of the description
4.8 / 5
Ease of following the route
4.5 / 5
Route interest
4.8 / 5
User 12608145

Overall rating : 3.7 / 5

Date of your route : Nov 30, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Very pretty place, not very well signposted, especially as it partly follows the gr...
Very tricky passage through the brambles.

Machine-translated

User 27586320

Overall rating : 5 / 5

Date of your route : Oct 20, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Superb scenery along the Trieux estuary, just above the beautiful Paimpol/Pontrieux railway line, with the added bonus of the magnificent colours of the gorse and heather. The route was easy, not very muddy, with a few small hills.

Machine-translated

dpxseb
dpxseb

Overall rating : 4 / 5

Date of your route : Aug 12, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : Not used / Not applicable
Route interest : ★★★★☆ Good
Very busy route : No

The route is done in reverse to finish along the rivers. The route is quite pleasant overall, with no particularly difficult sections.

Machine-translated

len.py
len.py

Overall rating : 4.7 / 5

Date of your route : Jul 14, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike along the banks of the Trieux. The setting is magnificent and there are hardly any roads, which is very pleasant. We sometimes had doubts between sections 5 and 6, as the path is very narrow in places or difficult to see due to the grass that has grown in some areas. But if you follow the GPX route and the advice in the description to stay on the left all the way (follow the river closely), there is no problem
Thank you very much for this hike!

Machine-translated

ceromphi
ceromphi

Overall rating : 5 / 5

Date of your route : May 17, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Storm Ciaran passed through, but the circular is now open. We were at low tide, and the climb up the Leff is truly magnificent. We can't wait for high tide to do this circular again, which took two hours at a leisurely pace...

Machine-translated

Philippe 22
Philippe 22

Overall rating : 4.7 / 5

Date of your route : Aug 21, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A delightful discovery of the banks of the Trieux and Leff rivers, forest paths and sunken lanes of exceptional quality.

Machine-translated

Nao
Nao

Overall rating : 5 / 5

Date of your route : Aug 17, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Superb hike and thanks to the author.
Shortly after point 7, there are some completely crazy dogs behind a fence. You can avoid them by going around and adding 400 metres to your walk.

Machine-translated

Géraud de BOISSET
Géraud de BOISSET

Overall rating : 5 / 5

Date of your route : Aug 08, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent walk, thank you for suggesting it.
We did the walk on a beautiful summer morning. It's a very beautiful route, which we walked at low tide. It's obviously even more beautiful at high tide when the water laps at the banks of the little river, but it's still charming when the mudflats stretch out in the beautiful morning light, and the Breton character of the site is all the stronger.
I can confirm that you need to wear good footwear for this walk and walking sticks are a plus, especially when walking up the Leff. However, the path is easily accessible to all.
Finally, be careful between POIs 6 and 7 or follow the GPX track, as there are many paths leading off the trail.

Machine-translated

kerheol
kerheol

Thank you for your review. Indeed, the section along the Leff may seem a little unexpected. I confirm that good shoes and walking sticks are essential.

Machine-translated

harrypotard
harrypotard

Overall rating : 5 / 5

Date of your route : Jun 23, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike alternating between sea, woods and fields. However, the paths are wet and even muddy all along the Leff. Bring suitable footwear and possibly walking sticks.
I can confirm: medium difficulty.

Machine-translated

Other walks in the area

Walking On the banks of the Leff and Trieux rivers

Visorando member
Sur les bords du Leff et du Trieux
↔14.23 km ↗+160 m ↘-160 m ◔4h 30 ▲Moderate
⚑Departure from Quemper-Guézennec (Côtes-d'Armor)
A sometimes uneven walk through the undergrowth along two Breton rivers, offering a different view depending on the tide level.

Walking The cross-country trails of Plourivo (Orange Trail)

Local authority
Les chemins de traverse de Plourivo (Circuit Orange)
↔11.56 km ↗+172 m ↘-172 m ◔3h 50 ▲Moderate
⚑Departure from Plourivo (Côtes-d'Armor)
This walk takes you through deciduous and coniferous woods where you can take the time to enjoy the cool air. You will also walk along farm tracks and past crops. After a few sections of road, which are nevertheless peaceful, you will return to the undergrowth and the coolness of the stream. This first part is fairly easy going. Then you will walk along the Leff river, with a few more technical sections, and the final climb will bring you to an unexpected finish. You will discover another part of the commune, not far from the Penhoat-Lancerf massif.

Walking In the woods of Penhouat-Lancerf

Visorando member
Dans les bois de Penhouat-Lancerf
↔8.83 km ↗+147 m ↘-149 m ◔2h 55 ▲Easy
⚑Departure from Plourivo (Côtes-d'Armor)
A magnificent walk through a pine forest. After following the Trieux river and passing through a tunnel through the hill, we walk alongside the Trieux tourist railway line to admire the chimneys of the Château de la Roche Jagu in the distance and reach the Saint-Jean Chapel. Don't be alarmed by the sound of gunshots: there is a clay pigeon shooting range nearby.

Walking Country route in Saint-Clet

Visorando member
Circuit campagnard à Saint-Clet
↔7.75 km ↗+108 m ↘-101 m ◔2h 30 ▲Moderate
⚑Departure from Saint-Clet (Côtes-d'Armor)
This is a magnificent route through the Breton countryside, with everything we love: short steep climbs, sunken paths, undergrowth and a sublime riverside.

Walking The three chapels of Plourivo (red route)

Local authority
Les trois chapelles de Plourivo (Circuit rouge)
↔11.58 km ↗+136 m ↘-134 m ◔3h 45 ▲Moderate
⚑Departure from Plourivo (Côtes-d'Armor)
The three chapels of Plourivo are finally united in a single hike! Lancerf overlooks the Trieux, Saint-Ambroise has its miraculous fountain, and Saint-Jean is nestled in the hamlet of Penhoat. Three chapels, three different environments. A modest heritage, but one worth discovering. Hike along the edges of fields, farm tracks and pine woods. Finish your tour by sitting down at a picnic table facing the Trieux, just across the railway line. The setting is peaceful and relaxing.

Walking Family trail in the woods of Plourivo

Local authority
Boucle dans les sous-bois de Plourivo (circuit vert)
↔9.48 km ↗+76 m ↘-78 m ◔2h 55 ▲Easy
⚑Departure from Plourivo (Côtes-d'Armor)
Troiad er c'hoadoù mat evit ar familh a-bezh. Heuliit ar biroù gwer. Dre hentoù bihan Plourivoù e tremen an droaid-mañ, war ar maez, er c'hoadoù, hag en traoñiennoù glas. This walk takes you along rural paths. You will cross the Plourivoù countryside through green valleys, following the Canon and Quinic streams. At around the3 km mark, on the left, you will see the Saint-Ambroise chapel. Feel free to leave the loop to explore it. Parts of the circuit may be muddy at certain times of the year, especially before and after the Allée des Chevreuils. At the Georges Kerbellec rest area, you can take the Pont Min botanical trail for a 1.5 km detour.

Walking Banks of the Trieux and Pleudaniel countryside

Visorando member
Bord du Trieux et campagne de Pleudaniel
↔11.21 km ↗+118 m ↘-117 m ◔3h 30 ▲Moderate
⚑Departure from Pleudaniel (Côtes-d'Armor)
A pleasant route through the Pleudaniel countryside and along the Trieux, either overlooking it or running alongside it.Several beautiful wayside crosses mark this route, as well as two chapels.Discover a tide mill and oyster farming.

Walking Circular from Saint-Jacques Chapel via Lanleff Temple

Visorando member
Boucle de la Chapelle Saint-Jacques par le Temple de Lanleff
↔8.20 km ↗+145 m ↘-146 m ◔2h 45 ▲Easy
⚑Departure from Tréméven (Côtes-d'Armor)
This rural route in Goëlo, along a hilly route, half of which is in the woods, offers the chance to discover elements of heritage of great historical interest, such as the Saint-Jacques Chapel and the Lanleff Temple.Please note that from Crec'h Lanleff onwards, the route is not signposted, so it is essential to use the Visorando app with its GPS pin. This walk is best done between May and October as the route can be very muddy.

For more walks, use our search engine .

The GPS track and description are the property of this route's author. Please do not copy them without permission.