Around Lake Brennilis and via Saint-Michel de Braspart.

Le Yeun Ellez, which has been modified since the construction of the nuclear power plant in 1962, is now adorned with the Nestavel dam reservoir. In the past, only the desert moors gave this basin its wild dimension, which Breton legend says constitutes the 'Gates of Hell'.
Let yourself be enchanted by the place and its legends.
The rest of the route takes you up the two neighbouring peaks: Tuchenn Kador (384 m) and Menez Mikel (381 m).

Details

3157969
Creation:
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  • Walking
    Activity: Walking
  • ↔
    Distance: 22.82 km
  • ◔
    Average duration: 7h 15 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 245 m
  • ↘
    Descent: - 252 m

  • ▲
    Highest point: 383 m
  • ▼
    Lowest point: 219 m

Photos

Description of the walk

Leave the D785 at the sign for Mont Saint-Michel.
The car park is at the end of the road.

GR® 37 (white and red markings).

(S/E) With your back to the car park, take a temporary route on the left to reach the Chapelle Saint-Michel, which stands on Mount Menez Mikel (the old steps were destroyed in the fire in the summer of 2022).
Descend via another stairway, cross the D84 road that leads up to the car park and continue opposite along a path through the moorland until you reach a crossroads.

PR marked in yellow.

Continue straight ahead, leaving theGR® on your right, descend towards the D785 and cross it with caution.

(1) Turn left onto the gravel path to the Ty Blaise Hunting/Nature Training Centre. On the left, hidden by vegetation, you can see the "An Eured Veign" megalithic alignment. Since the fire in the summer of 2022, these megaliths are clearly visible.

Not signposted.

(2) At the crossroads, continue straight ahead, leaving theGR® trail on your left, and follow a path across the moor towards the rocky summit of Roc'h Cléguer, a climbing site. Turn left to descend straight ahead and rejoin the GR® trail.

GR® 37 (white and red markings).

(3) Turn right and follow the wide clay path dominated by Roc'h Cléguer (317m) in a south-easterly direction. The path has numerous puddles that you will need to regularly walk around. The map indicatesGR®37but there are no signs on the ground. Walk along a coniferous forest on your left and pass close to a water reserve for firefighters (note the black colour of the water due to the peat). You will arrive at a crossroads.

PR marked in yellow.

(4) Turn left and join a small road. Follow it until you reach a crossroad, which you take to arrive at the village of Forc'han.

(5) Cross the village, veering to the left, and head towards the Maison du Lac, an information centre about electricity production, the electricity industry and the various stages of the decommissioning of the nearby power station. Continue towards the dam, with the buildings of the former nuclear power station on your right. You will come to a footbridge.

(6) Cross the footbridge, continue behind the Nestavel dam and walk along the lake shore, passing close to a campsite. Continue along a dirt track, which can be wet and muddy in places, alongside the Venec Nature Reserve. You will come to a road.

(7) Follow this road, which goes around the Vénec peat bogs, then turn left at the first intersection.

GR® 37 (white and red markings).

(8) At the three-way junction, turn right off the road and continue on the north-west facing path which turns left towards a footbridge.

(9) Cross the footbridge and continue through this area of moorland and heather.

(10) Turn right with theGR® and continue to the first houses in Botmeur.

(11) Turn left to cross the village (pavement provided), pass the cemetery, the church and then the town hall.

(12) Turn left, then right, cross the hamlet and follow the small road that passes between meadows and fields. The marks on the ground indicate that it is used more by livestock than cars. Continue to the Balanec Ber crossroads where you will meet theGR® 37 and 380.

(13) Turn right to cross this hamlet (picnic table) and continue to Botcador. On your left, you will see an old wash house renovated in 2001. Note the architecture of the houses. In the heart of the hamlet, another picnic table awaits you near the Tree of Liberty.
Nearby is a remarkable well dating from 1818.

(14) At the exit of the hamlet, turn right onto a path between meadows that runs alongside the departmental road and joins it at a place called La Croix Cassée.

(15) Cross the D785 with extreme caution and follow it to the right for about a hundred metres. Turn left onto a wide path that leads to an old farmhouse and, almost immediately, turn left onto the path that climbs steadily towards the summit of Tuchenn Kador (383m).

(16) At the summit, turn slightly left towards the large rock from where you can enjoy the most beautiful view of Lake Brennilis (Saint-Michel Reservoir on the map). This summit is also a starting point for paragliders.
Continue along this single grassy path which descends steadily through heathland and scrub. From time to time, large cairns mark the route. Join a road near a television relay station.

(16) Follow the D42 to the right for a few dozen metres and take theGR® trail on the left towards Mont Saint-Michel. At the fork, ignore the trail that branches off to the right into the heath and continue climbing to a car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 356 m - Mont Saint-Michel car park - Chapelle de St-Michel
  2. 1 : km 1.16 - alt. 291 m - Crossing the D785
  3. 2 : km 1.95 - alt. 274 m - Trail junction
  4. 3 : km 3.21 - alt. 266 m - GR junction
  5. 4 : km 4.86 - alt. 257 m - Turn right onto a road.
  6. 5 : km 7.03 - alt. 231 m - Entrance to the village of Forc'han
  7. 6 : km 8.02 - alt. 219 m - Footbridge
  8. 7 : km 10.16 - alt. 229 m - Road junction
  9. 8 : km 11.1 - alt. 232 m - Turn left at the three-way junction.
  10. 9 : km 12.3 - alt. 229 m - Footbridge
  11. 10 : km 13.42 - alt. 234 m - Fork in the road
  12. 11 : km 14.74 - alt. 248 m - Entrance to Botmeur
  13. 12 : km 16.14 - alt. 253 m - Balanec Ber
  14. 13 : km 17.16 - alt. 261 m - Botcador
  15. 14 : km 18.04 - alt. 295 m - D785 at Croix Cassée
  16. 15 : km 19.61 - alt. 383 m - Tuchenn Kador
  17. 16 : km 21.51 - alt. 301 m - Television relay station. Close to the source of the - Ellez (rivière) - Affluent de l'Aulne
  18. S/E : km 22.82 - alt. 356 m - Mont Saint-Michel car park - Chapelle de St-Michel

Notes

This experimental power station in Brennilis, which came into service in 1967 and was shut down in 1985, is still in the process of being dismantled.

Be sure to wear good waterproof walking shoes.
There are no water sources along the route.

Small variation: at point (9), there is the option of a return trip to the part of the peninsula indicated on the map (viewpoint).
This is about 2 km in total.

Thanks to VR LecozDjipi, who helped me reorganise this route following the closures due to the fires in the summer of 2022.

Worth a visit

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

4.5 / 5
Based on 7 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.4 / 5
Route interest
4.6 / 5
Padrig F
Padrig F

Overall rating : 4.7 / 5

Date of your route : Aug 02, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The map is very clear and easy to follow. Thank you!
A bit too much road for my taste, especially the section between Le Libist and Botkador (but crossing Botmeur is worth the detour).
The final part is magnificent. Bevet Menez Are! Long live the Monts d'Arrée!

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Louarn
Louarn

Overall rating : 5 / 5

Date of your route : May 08, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent hike around Lake Saint-Michel, near the Brennilis nuclear power station and Yeun Elez. The section along the ridge between Menez Mikel and Menez Kador is particularly breathtaking. As suggested by LecozDjipi, we chose to start from Botmeur rather than the car park at Saint-Michel Chapel, which allows you to really enjoy the approach to the lake and the mountains that gradually reveal themselves, first between the trees and then completely at the edge of the lake (taking the route in the opposite direction to the one suggested).

The trail is very easy to follow. Some parts of the path were wet, but nothing too bad with good shoes. A tree had fallen on the path between points 2 and 3, but it was possible to get around it through the undergrowth or by taking a slight detour. We didn't meet many people, except at Menez Mikel, which is accessible by car.

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Yohann YB
Yohann YB

Overall rating : 5 / 5

Date of your route : Aug 25, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Hike done yesterday.
Very enjoyable.
The description makes it easy to follow the route.

I had a great time.
Heather as far as the eye can see, moorland... nature is reclaiming its place a year after the fire.

The landscapes are varied.

I'll definitely be back.

Thank you ;-)

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FLOCH
FLOCH ★

Thank you again for your contribution.
Michel from Quimper

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LecozDjipi
LecozDjipi

Good evening

I am delighted to have been able to help finalise this course.
I really appreciated your responsiveness.

In addition, I may have an alternative for the "On the trails of the Monts d'Arrée through the Yeun-Elez bog" route, which is no longer fully accessible due to fires. This alternative seems possible on the IGN map and Google Maps satellite view.
I will check this out on site as soon as I have the opportunity and the weather permits.

I will keep you informed.

See you soon, perhaps on the trails of Finistère.
Best regards.

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FLOCH
FLOCH ★

Thank you also for this exchange, which allows us to update a hike that can be used.
This is how I see Visorando.

I look forward to hearing from you.
Kind regards

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Eirown
Eirown
• Edited:

Hello
This constructive exchange is very nice.
So, I'll be doing it again soon...
Just to see the difference between summer and autumn.

Happy hiking, everyone!

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FLOCH
FLOCH ★

I'm going to make the most of your knowledge of the area.
I haven't had the opportunity to hike in the area and I don't know Botmeur.
Good idea for that alternative car park.
Best regards

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LecozDjipi
LecozDjipi

One last suggestion: at point 10, I think it would be more interesting to continue north on the GR37 to reach the village of Botmeur, then follow the D42 to point 12.

This doesn't change the distance much, but it allows you to discover the village's heritage (church, fountain, wash house, etc.). There is little traffic on the D42 and pavements have recently been built as far as Salou.

Botmeur has plenty of parking spaces and can be an alternative starting point in summer when Mont Saint-Michel is at its busiest.

Best regards.

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FLOCH
FLOCH ★

Interesting idea, I will modify my layout and description again.
Kind regards.

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LecozDjipi
LecozDjipi

Another suggestion: start at the Ménez Mikel car park.
This avoids walking along a noisy road and saves a few hundred metres.
But hey, it's a matter of taste.

Best regards.

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FLOCH
FLOCH ★

Thank you again for all these details.
I will take them into account.
Kind regards.

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LecozDjipi
LecozDjipi

At point (1), the megalithic alignment is now clearly visible. This summer's fires cleared away the vegetation. A path allows you to cross it.

Please note: around point (18), all wooden staircases are closed until further notice as they were badly damaged by the fires. Access to the chapel is via the D84 to the car park and then the roundabout. The chapel is currently undergoing renovation work and is covered in scaffolding. It remains fragile even though it withstood the inferno.

Kind regards

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aldelpech
aldelpech

Overall rating : 5 / 5

Date of your route : May 26, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent route, with lots of variety, between industrial wasteland near the power station, forest, cultivated or grazed land and wetlands (peat bogs).
We started the route at point 4 and did the circular route from there.
A really great hike. The weather had been dry for a while and there were no difficult sections. I think that after rain there would be some places that would not have been easy. There are wooden footbridges in many places, but there are still some wet sections. And these footbridges are certainly slippery in wet weather. And probably difficult for dogs.

A route to be recommended in dry weather.

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Eirown
Eirown

Good evening,
At the same time, it's a tour of the lake, so the markings don't need to be very precise, but if we can improve them, so much the better.
Personally, I used the map provided on the website, from memory, and didn't encounter any problems.
See you on the trails!

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