The Erdeven Megalith Trail

A lovely walk through the woods to discover the megaliths in the commune of Erdeven, Mane Croc'h, César's Chair, the Kerzerho alignments...

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.11 km
  • ◔
    Average duration: 2h 20 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 7 m
  • ↘
    Descent: - 7 m

  • ▲
    Highest point: 24 m
  • ▼
    Lowest point: 14 m
  • ⚐ Country: France
  • ⚐ City: Erdeven (56410)
  • ⚑
    Start/End: N 47.628194° / W 3.121253°
  • ❏
    IGN map(s): Ref. 0821OT
  • Hour-by-hour weather

Description of the walk

Park at Mané Croc'h, where there is parking on both sides of the road.

(S/E) From the car park, head towards Mané Croc'h along the path. Go around the dolmen on the right and, three-quarters of the way around, continue along the path that enters the forest. Find a track and follow it to the right. Take thefirst grassy path on the right. At the gorse heath, turn left onto a small path. Keep to the left of the path to reach the alignment known as La Chaise de César (Caesar's Chair) (numerous standing or collapsed blocks).

(1) Go to the left to leave these alignments and follow a path that leads back to the track in the forest. Follow the track on the right with theGR®34(red and white markings). After a hundred metres, turn left at a 90° angle.

(2) At the next crossroads, turn right, still following theGR®34. Further on (elevation 23), turn left to reach a crossroads with four paths.

(3) Continue to follow theGR® 34, turning right. Ignore a path on the left and then one on the right.

(4) At the intersection, continue straight ahead (leaving theGR® trail to the right). At the next intersection, turn left. Walk along the fields until you reach a T-junction.

(5) Turn right and follow a path that may be muddy in places.

(6) Take thefirst path on the left. Note the first menhirs and continue to the Kerzerho alignments. Wander among the stones.

(7) Return along the path in the opposite direction until you reach the previous intersection.

(6) Then turn right.

(5) Continue straight ahead on the wide path, heading east and ignoring all the side paths. You will come to the crossroads you took earlier.

(3) Turn right, heading south. Pass the first houses in Kerbernès and, when the road turns right, continue straight ahead on a path. At the next intersection, take the small road on the left. Pass the farm and houses in the hamlet of Tronio, staying on the main path.

(8) At the three-way junction, turn right and follow a wide path south-east. Stay on the main path until you reach the village of Crucuno. Turn right onto the small road serving the houses.

(9) At the crossroads, turn left and take the hard shoulder. A little further on, the path moves away from the road, which is on the other side of a hedge. After about 250 m, the path moves away from the road and quickly leads to the starting car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 21 m - Car park at - Dolmen de Mané Croc'h
  2. 1 : km 0.62 - alt. 20 m - Alignement dit La Chaise de César
  3. 2 : km 1.67 - alt. 17 m - Triangular crossroads
  4. 3 : km 2.35 - alt. 17 m - Crossroads of four paths
  5. 4 : km 3.01 - alt. 15 m - Intersection
  6. 5 : km 4.01 - alt. 15 m - T-junction
  7. 6 : km 4.28 - alt. 19 m - Intersection
  8. 7 : km 4.49 - alt. 18 m - Alignements de kerzerho
  9. 8 : km 6.73 - alt. 18 m - Three-way junction
  10. 9 : km 7.49 - alt. 24 m - Crucuno
  11. S/E : km 8.11 - alt. 21 m - Car park at - Dolmen de Mané Croc'h

Notes

In wet weather, the trail can be very muddy.

There is a pond not far from the starting point.

Worth a visit

The Kerzerho alignments and other megaliths such as César's Chair and Mané Croc'h add interest to this short hike through the woods and countryside of Erdeven.

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 12 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.1 / 5
Route interest
4.9 / 5
User 3706415

Overall rating : 3.7 / 5

Date of your route : Mar 23, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Take the opposite route, following the yellow signs

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Bernes29
Bernes29

Overall rating : 4.3 / 5

Date of your route : Sep 09, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Magnificent forest and megalith

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User 12353919
• Edited:

Overall rating : 4 / 5

Date of your route : Aug 25, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : Yes

Signage is very poor!

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Marcheuse71
Marcheuse71

Overall rating : 4.7 / 5

Date of your route : Aug 19, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Very nice!

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User 25879709

Overall rating : 4.3 / 5

Date of your route : May 26, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

great

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JJR Rouen
JJR Rouen

Overall rating : 4.7 / 5

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

A very pleasant hike along beautiful forest trails and past megaliths. It is probably easier to follow in the opposite direction by following the municipal markings.

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BrunoB
BrunoB

Overall rating : 4.7 / 5

Date of your route : Aug 19, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A lovely family walk, allowing you to discover distinctive megaliths in a variety of locations. The forest remains beautiful this summer.
I just forgot to mention the little detour via Mané Braz, which is off the main path we were following...

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Map29
Map29

Overall rating : 5 / 5

Date of your route : Jun 24, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

An interesting route, especially if you visit the less frequented small standing stones. There are a few people on the path, but not too many. Kervezho is very busy with tourists because it is easy to access.
Magnificent forest and the option to walk in the undergrowth instead of on the recommended paths.

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JMC35
JMC35

Overall rating : 4.7 / 5

Date of your route : May 17, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Possible departure point at 7 (busy car park). Follows 95% of the Erdeven 'megalith route', but in reverse. Between 1 and 4, there are no longer any signs for the GR34. After 2, take a look at the "Mané Braz" covered walkways on the right. It's worth a look (not mentioned in this description). At Crucuno, make a return trip to the cromlech (take the small street to the left of the dolmen). Also go to the edge of the "er Varquez" pond: parish specific to Brittany.

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fredman5962
fredman5962

Overall rating : 5 / 5

Date of your route : May 13, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful hike to discover stunning stone alignments, menhirs and dolmens.
The paths are very pleasant and with the GPX track there is no risk of getting lost.
The hike is very easy.
A wonderful discovery.

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Nielson
Nielson

Overall rating : 4 / 5

Date of your route : Jun 20, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Although less prestigious than Carnac, it remains very interesting and impressive due to its diversity (forest, pond, menhirs and dolmens) and the size of the megaliths.
It is a real shame that the municipality of Erdeven does not maintain this route. The signposts are in poor condition. The path is sometimes difficult to access due to overgrown vegetation.
Having asked the tourist office, this is a deliberate decision by the municipality!
Are they afraid that this place will become too crowded?
Fortunately, Visorando provides a detailed, up-to-date and easy-to-use description.
Thank you for this discovery. Although I am from the area, I knew nothing about this place.

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Corto22
Corto22

Overall rating : 5 / 5

Date of your route : Oct 10, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A superb route, almost entirely on paths and often under cover of vegetation.
Frequented but nothing more, the season must have something to do with it.
The sites we encountered were impressive.
A walk we will remember.

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