The Guillec Valley

All kinds of landscapes can be enjoyed throughout this hike, which is virtually flat.
After walking alongside fields and crossing a farm, walkers arrive at a sandy bay that opens up to the English Channel. Then, after the point, they walk alongside a river that flows freely in a wide cove.
Finally, a path through a wooded area alongside the river completes the route.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 10.96 km
  • ◔
    Average duration: 3h 15 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 50 m
  • ↘
    Descent: - 43 m

  • ▲
    Highest point: 43 m
  • ▼
    Lowest point: 4 m

Photos

Description of the walk

Departure from the car park at the Chapel of Prat Coulm

(S/E) Take the path at the edge of the woods to the right of the car park. Then follow the wide gravel path on the left.

(1) Take the path on the right that descends towards the stream (this path is opposite the one you will take on the way back (currently on the left).
Turn right and cross the D10 (be careful, cars drive at 90 km/h); continue straight ahead until the next crossroads.

(2) Continue straight ahead, then turn right immediately at the next junction. Continue along this road

(3) Look for a path on the left, which will be the return route. Continue straight ahead and at Créac'h Bihan (see note below in Practical Information), continue on the right to cross the entire hamlet until you reach Rue de Bourette. Follow it to the left to reach Bourette.

(4) At the crossroads, take the street on the left, heading north, until you reach a road that leads to Guelveiny. On the road, continue on the left, noting the wash house on your left, pass a first crossroads "Gelveiny", a second crossroads "Brémentec" and follow the road straight ahead to cross Kerscao.

(5) When you reach a crossroads in Cantel, take the "dead end" road slightly to the left, pass between the houses and continue along the road. Turn left before the river (do not cross the bridge). Continue along the left bank of the Horn River until you reach Kerbrat.

(6) In Kerbrat, turn right onto the road and then take the path on the right (GR®34).
Follow the GR®34 to the end of the peninsula.

(7) There is a bench where you can rest and admire the magnificent landscape. Turning 180° from left to right (see photo), you will see: Anse de Guillec, the port of Moguériec, Pointe de Tévenn, the English Channel, the island of Siec, Pointe de Dossen with the lighthouse on the island of Batz on the horizon, and finally the Santec national forest with the mouth of the Horn.
Continue along the coastal path.

(8) Opposite Tévenin, take the path on the right, cross the car park, then turn right onto the road and after 30 metres take the path on the left.
Ignore the two paths on the right with wooden fences (beach access).
Turn right onto a shaded path before a pavilion with large roof windows (Kerlivichen). Go down a few steps and turn left. Continue along this path until you return to the road.

(3) Turn right, then after passing the access to Palud on your right, return to the crossroads you passed on the way there.

(2) Turn right, then take the first road on the left. Cross the D10 (be careful, cars always drive at 90 km/h) and continue straight ahead along the path.
The path makes a 90° left turn, then a U-turn to the right, crossing an old railway line (do not take this path), then a path to the left. After 150 metres, follow the path to the left.
At a bend (access to the Kerouzéré mill), take the hairpin bend to the right. It turns left and crosses the bridge over the Guillec.

(9) After crossing the bridge, you will see a trout farm on your right. Take the path on the left for more than 500 metres. Just before the bridge pier, turn right onto a fairly steep path to reach the top of the bridge. Follow the gravel path to the right to return to the crossroads you saw on the way there.

(1) Take a stony path on the right that climbs slightly. On the road, turn left and follow it to reach the car park where you started (S/E).

Waypoints

  1. S/E : km 0 - alt. 32 m - Chapel car park with wash house
  2. 1 : km 0.28 - alt. 28 m - Path to the right in a hairpin bend - Guillec (fleuve)
  3. 2 : km 0.92 - alt. 6 m - Crossroads passed on the way there and back
  4. 3 : km 1.29 - alt. 14 m - (A) straight ahead - (R) right
  5. 4 : km 1.91 - alt. 22 m - Bouret
  6. 5 : km 3.35 - alt. 9 m - Cantel _ straight ahead left-right
  7. 6 : km 4.03 - alt. 6 m - Kerbrat - road on the right then GR trail
  8. 7 : km 5.44 - alt. 9 m - End of the peninsula
  9. 8 : km 6.47 - alt. 8 m - Path on the right
  10. 9 : km 9.52 - alt. 10 m - Continue along the path on the left
  11. S/E : km 10.96 - alt. 32 m - Chapel car park

Notes

Modification of the route by the author in February 2025 following feedback from Visorandeurs: From Crec'h Bihan (300 m after WPt 3 and up to the Guelveiny crossroads, it is essential to follow the route described above as the markings may be incorrect and lead you across private property.

Worth a visit

The viaduct: Spanning the Guillec River with its ten 23-metre-high arches, the Saint Jacques viaduct was built in the second half of the 19th century and opened in 1907.

Intended for light and slow traffic between Saint-Pol-de-Léon and Brest via Lesneven, this former railway bridge was used by what was affectionately nicknamed the "little potato train", which disappeared in the 1950s, overtaken by road traffic.

Prat Coulm Chapel

 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.

Reviews and comments

4.2 / 5
Based on 21 reviews

Reliability of the description
4.2 / 5
Ease of following the route
4.1 / 5
Route interest
4.5 / 5
bernard coulomb
bernard coulomb

Overall rating : 4.5 / 5

Date of your route : Oct 09, 2025
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Chapels are always closed at this time of year in this region. But the walk is still pleasant and interesting in many ways. From 5 to 8 o'clock, it is simply exceptional: perfect light provided by the combination of blue sky, clouds and sunshine.

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Bruno 29
Bruno 29

Overall rating : 4.7 / 5

Date of your route : Feb 16, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant discovery between land and sea 🌊
You need to adjust your route to point 4 because the path is no longer there

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Randos Plestinaises
Randos Plestinaises
• Edited:

Overall rating : 3.3 / 5

Date of your route : Sep 15, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : Yes

Lovely walk.
Lovely beaches.
Small heritage sites adorn the route (chapel, wash houses, viaduct)
You won't be alone during the holidays and at weekends.
These paths are shared with other activities (hiking clubs, joggers, trail runners, fishermen, etc.)
Watch out for cyclists (electric bikes) on the bends of the tarmac sections.
The sharing of the route between PR® (yellow) and GR® is a source of confusion.
There are no markings between Bouret and the bridge over the Horn after Le Cantel.
The GPX track and/or map will be useful until Le Cantel.
Once you reach the bridge over the Horn, it becomes straightforward again:
just follow the coastal path on the left and then the path along the Guillec.
The walk is at its best in the sunshine and at high tide.
Apart from these points, this very easy route is most enjoyable.
Change to the route at point 4 across the fields towards Guelveiny
There is no longer a public path. The IGN maps are incorrect. The OpenStreetmap map is correct.
The indicated route and the GPX track cross private property. (See the land registry)
The detour is via Bouret from Créac'h Bihan.

  1. Continue straight on at Créac'h Bihan.
  2. When you reach the Bouret wash house, turn left onto Rue de Pen ar Lan, then take the dirt track to Guelveiny.

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ventdouest
ventdouest

Overall rating : 4 / 5

Date of your route : May 04, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A very beautiful route with a mix of countryside, seaside, river...

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Kellen
Kellen

Overall rating : 3 / 5

Date of your route : Apr 28, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★☆☆ Average
Very busy route : Yes

The route shown on the app does not match the marked trail, which is confusing. Otherwise, it's a pleasant hike.

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loy29
loy29

Overall rating : 4.3 / 5

Date of your route : Aug 04, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

very good, no complaints

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petites jambes
petites jambes

Overall rating : 5 / 5

Date of your route : Sep 15, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

a superb hike enhanced by the crossing of the Santec forest and return via the magnificent beach.

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tratracorp
tratracorp

Overall rating : 5 / 5

Date of your route : Aug 05, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Superb views and discoveries along the route...

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Claude-Meignen
Claude-Meignen

Overall rating : 5 / 5

Date of your route : Mar 22, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Magnificent hike (best done at high tide or when the tide is not too low)
No difficulty, the coast between 6 and 7 is magnificent. The tidal bridge over the Horn is also typical: we crossed it and did the circular in the Santec forest (GR 34) and came back via the beach!
The next day, to see the Guillec valley at high tide, we walked from 7 to 2 and went up to Moguériec!
The circular towards 9 is also worth the detour: a small valley full of flowers!

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robertsylvie
robertsylvie

Overall rating : 4.3 / 5

Date of your route : Mar 14, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

At point 5, we crossed the bridge to reach the tip of Le Dossen "opposite Ile de Sieck". Return along Le Dossen beach to the bridge at point 5 to resume the original route. Additional distance 3.750 km, total hike 14.750 km for a walking time of approximately 3½ hours. Picnic tables along the route.

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LE GLEAU
LE GLEAU

Overall rating : 4.3 / 5

Date of your route : Dec 17, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Very pleasant along the Guillec and Horn.
Difficult to follow the route in the agricultural area.

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Galahad
Galahad

Overall rating : 4.3 / 5

Date of your route : Nov 27, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

We only did part of the route.
The scenery was magnificent!

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Galahad
Galahad

Overall rating : 4.3 / 5

Date of your route : Nov 29, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

We got "lost" at point 4 because the change in direction is not marked and we hesitated. There are many paths leading off to the right across the fields.

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Les pommiers
Les pommiers

Overall rating : 5 / 5

Date of your route : Oct 15, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful route between land and sea

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Caro1
Caro1
• Edited:

Overall rating : 3.3 / 5

Date of your route : Aug 15, 2019
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good

Follow the route in the "topoguide" book for the Léon region, a disaster.
We turned back halfway and didn't even complete the GR circular.
We'll try your route and hope it's easy to follow.

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