Around Lake Brennilis and via Saint-Michel de Braspart.

The Yeun Ellez, altered since the construction of the nuclear power station in 1962, is now flanked by the reservoir of the Nestavel dam. In the past, only the barren moors gave this valley its wild character; according to Breton legend, it is said to be the ‘Gates of Hell’.
Let yourself be enchanted by the place and its legends.
The rest of the route takes you up to the two neighbouring peaks: Tuchenn Kador (384 m) and Menez Mikel (381 m).

Details

3157969
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 14.18 mi
  • ◔
    Average duration: 7h 15 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 804 ft
  • ↘
    Descent: - 827 ft

  • ▲
    Highest point: 1,257 ft
  • ▼
    Lowest point: 719 ft

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 (red and white markings).

(S/E) With your back to the car park, take a temporary path on the left leading to the Chapelle Saint-Michel, which stands atop Menez Mikel (the old steps were destroyed in the fire of summer 2022).
Head back down via another stepped path, cross the D84 road leading up to the car park and continue straight ahead along a path through the moorland until you reach a crossroads.

PR® marked in yellow.

Carry on straight ahead, letting theGR®® head off to the right, then head down towards the D785 and cross it with care.

(1) Turn left onto the stony path leading to the Ty Blaise Hunting and Nature Training Centre. On the left, hidden by the vegetation, you can make out the ‘An Eured Veign’ megalithic alignment. Since the summer 2022 fire, these megaliths have been clearly visible

No signposting.

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

GR® 37 (marked in white and red).

(3) Turn right and follow the wide clay track, heading south-east, with Roc’h Cléguer (317m) looming overhead. The path has numerous puddles which you’ll need to go round regularly. The map showsthe GR®®37but there are no signs for it on the ground. Walk alongside a coniferous woodland on your left and pass close to a fire brigade water reservoir (note the black colour of the water, caused by peat). You’ll reach a crossroads of paths.

PR® marked in yellow.

(4) Turn left and join a small road. Follow this until you reach a crossroads, where you take the road leading to the village of Forc’han.

(5) Cross the village, veering slightly to the left, and head towards the Maison du Lac, an information centre on electricity generation, careers in the electricity sector and the various stages of the decommissioning work on the neighbouring power station. Continue towards the dam, with the buildings of the former nuclear power station on your right. You’ll reach a footbridge.

(6) Cross the footbridge, continue behind the Nestavel dam and walk along the lake’s banks, passing close to a campsite. Carry on along a dirt track, which is sometimes damp and muddy, alongside the Venec Nature Reserve. You’ll reach a road.

(7) Follow this road, which skirts the Vénec peat bogs, then turn left at the first junction.

GR® 37 (red and white markings).

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

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

(10) Turn right onto theGR®® and carry on until you reach the first houses in Botmeur.

(11) Turn left to cross the village (paved footpath), passing the cemetery and the church, then on to the town hall.

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

(13) Turn right to cross this hamlet (picnic table) and carry on to Botcador. On your left, look out for an old washhouse 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) On leaving the hamlet, turn right onto a path through the meadows which runs parallel to the main 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 track heading towards an old building 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 boulder, from where you’ll have the finest view of Lake Brennilis (Saint-Michel Reservoir on the map). This summit is also a launch site for paragliders.
Continue along this single grassy path, which descends steadily through heathland and heather. From time to time, large cairns mark the route. You’ll reach a road near a television relay station.

(16) Follow the D42 to the right for a few dozen metres, then turn left onto theGR®® path towards Mont Saint-Michel. At the fork in the road, ignore the path branching off to the right into the heathland and continue uphill to a car park (S/E).

Waypoints

  1. S/E : mi 0 - alt. 1,168 ft - Mont Saint-Michel car park - Chapelle de St-Michel
  2. 1 : mi 0.72 - alt. 955 ft - Crossing the D785
  3. 2 : mi 1.21 - alt. 899 ft - Trail junction
  4. 3 : mi 2 - alt. 873 ft - GR junction
  5. 4 : mi 3.02 - alt. 843 ft - Turn right at the fork onto a road
  6. 5 : mi 4.37 - alt. 758 ft - Entrance to the village of Forc’han
  7. 6 : mi 4.98 - alt. 719 ft - Footbridge
  8. 7 : mi 6.31 - alt. 751 ft - Road junction
  9. 8 : mi 6.9 - alt. 761 ft - Turn left at the three-way junction
  10. 9 : mi 7.64 - alt. 751 ft - Footbridge
  11. 10 : mi 8.34 - alt. 768 ft - Junction
  12. 11 : mi 9.16 - alt. 814 ft - Botmeur entrance
  13. 12 : mi 10.03 - alt. 830 ft - Balanec Ber
  14. 13 : mi 10.67 - alt. 856 ft - Botcador
  15. 14 : mi 11.21 - alt. 968 ft - D785 at La Croix Cassée
  16. 15 : mi 12.18 - alt. 1,257 ft - Tuchenn Kador
  17. 16 : mi 13.37 - alt. 988 ft - Television relay station. Near the source of the - Ellez (rivière) - Affluent de l'Aulne
  18. S/E : mi 14.18 - alt. 1,168 ft - Mont Saint-Michel car park - Chapelle de St-Michel

Notes

The Brennilis experimental power station, which came into service in 1967 and was decommissioned in 1985, is still being dismantled.

Make sure you wear good, waterproof walking shoes.
No water sources have been identified along the route.

A short detour: at point (9), there is the option of a return trip to the area marked ‘La Presqu’Île’ on the map (viewpoint).
Allow for around 2 km in total.

Thanks to VR LecozDjipi, who was a great help in reorganising this route following the restrictions imposed due to the fires of summer 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 8 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.4 / 5
Route interest
4.6 / 5
verocean
verocean

Overall rating : 4.3 / 5

Date of your route : Sep 02, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Hello, everyone.

A brilliant route, at the end of August without too many people. Clear weather, so the views were stunning. Reliable and comprehensive directions.
Thank you for such a lovely experience§

Machine-translated

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!

Machine-translated

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.

Machine-translated

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 ;-)

Machine-translated

FLOCH
FLOCH ★

Thank you again for your contribution.
Michel from Quimper

Machine-translated

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.

Machine-translated

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

Machine-translated

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!

Machine-translated

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

Machine-translated

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.

Machine-translated

FLOCH
FLOCH ★

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

Machine-translated

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.

Machine-translated

FLOCH
FLOCH ★

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

Machine-translated

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

Machine-translated

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.

Machine-translated

Other walks in the area

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.