The Rance and the Rophemel Pond

In Rophemel, the Rance flows through a valley of great beauty. Built in the 1930s, the hydroelectric dam submerged nine fulling and wheat mills. The dam and valley have been a "listed and protected site" since 1945. In addition to producing electricity, the reservoir also supplies drinking water to the city of Rennes.
The reservoir was drained in early 2018 to carry out work on the dam.
Another drainage operation is underway (2024) to carry out further work on the dam (see my hike: https://www.visorando.com/randonnee-6431... )

Details

1625516
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 16.04 km
  • ◔
    Average duration: 5h 25 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 286 m
  • ↘
    Descent: - 281 m

  • ▲
    Highest point: 93 m
  • ▼
    Lowest point: 22 m
  • ⚐ Country: France
  • ⚐ City: Guenroc (22350)
  • ⚑
    Start/End: N 48.320119° / W 2.062895°
  • ❏
    IGN map(s): Ref. 1117SB
  • Hour-by-hour weather

Photos

Description of the walk

Park in the car park at the Rophemel dam, located in the commune of Guenroc (22).

(D:A) Take the path bordering the field opposite the car park and go around it on the right until you reach a path leading slightly downhill into a wood.

(1) After 120 metres, when you see the first houses of the hamlet of Prédalun, immediately turn right onto the path. When you reach the meadow, go around it on the right until you reach a ford in the vegetation, which will allow you to cross the small stream.

(2) Walk along the cultivated field until you reach and take the footbridge crossing the Rance. Walk along this other field until you reach the small tarmac road.

(3) Turn right and follow the tarmac road for 180 metres, then turn left onto the slightly uphill path at the edge of the woods. Follow it to the Chapelle du Val chapel in the commune of Plouasne.

(4) At the chapel, take the forest path on the right. After 170 metres, at the first three-way junction, leave the path on the left and take the one on the right, which climbs steeply to join another path, also uphill. After a sharp left turn, continue through the undergrowth. Walk along a cultivated field for a few metres to cross a grove located under the water tower to the stone path under the high-voltage line.

(5) Take the gravel path on the left to reach the hamlet of Le Rocher, cross it to reach La Noë via a small tarmac road. At the intersection, go straight ahead to reach a gravel path leading to a plateau of large crops and very clear of vegetation.

(6) At the first junction with theGR®34C, continue to the right along another gravel path leading to the hamlet of Callouet, identifiable by its rotating solar panels.

(7) At the exit of the hamlet, turn right onto a small tarmac road. After 80 metres, turn right again onto a grassy path crossing the fields. When you reach the undergrowth, take a small sunken path on the right, skirting a meadow on the right. Cross a stream and climb a few metres to take the path on the left leading to the edge of the pond. Continue, watching out for potentially dangerous rocks, until you reach a grassy area with a shed that can be used as a shelter. Continue along the path running alongside the pond on the right until you reach the D25 near the bridge. Cross the bridge.

(8) Take the path on the right that enters the undergrowth, not the one that descends to the bank of the pond. Follow it until you go around some houses and, after a few steps, come out onto a small tarmac road. Take it on the right. Cross the hamlet of La Hannelais. At the end of the tarmac road, follow the path leading left into the undergrowth, ignoring the path leading down to the bank of the pond. When you reach a small meadow, go around it on the right, leaving the houses on your left. Continue along the path going around the Ker Al Lann holiday village in Guitté.

(9) After going around the point, leave the path leading to the holiday village and take the path on the right that descends to the edge of the pond. Follow it, sometimes winding through the undergrowth, until you reach the tarmac road leading to the holiday village. Do not take this road, but immediately turn right onto the path that crosses a small stream and leads to the edge of the pond. Continue for about 2 km, taking care on the steep sections, until you reach a picnic area.

(10) Join the paved road, crossing the hamlet of La Suais, and at the end of the climb, turn right onto a grassy path, sometimes blocked by a simple string. Reach the edge of the pond and follow it until you arrive at the hamlet of Beaumont. Cross the bridge over the pond on the right, with the Château de Beaumont on your left.

(11) After the bridge, turn right onto the grassy path running alongside the fields and continue along the edge of the woods.

(12) As you approach a property, leave the path on the right leading to this house and continue straight ahead along the path through the woods. A few metres further on, at a left-hand bend, leave the path and take the path on the right, still through the woods.

(13) Be careful, at this point, the path invites you to go straight ahead, but this will only lead you deeper into the vegetation. Turn left near the balustrade and climb a few steps up the steep path. Further on, turn right to reach the viewpoint over the pond.

(14) Retrace your steps and take the path on the right that runs along the top of the pond.

(15) Access the Fontaine de Jarnouen fountain located 10 metres to the left of the path. Then go around the tip of the hamlet of La Giguais and pass in front of Beau Rocher. After a light shelter with a pontoon on the bank, leave the hamlet of Ville Bourdais on your left to arrive at the confluence of the Rance and Néal rivers.

(16) Continue through the undergrowth towards the Rophemel dairy farm, going around it on the right.

(17) At the signpost, take the path on the right towards La Choletais and the dam car park, your starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 74 m - Rophemel dam car park
  2. 1 : km 0.36 - alt. 44 m - Prédalun hamlet, path on the right
  3. 2 : km 0.73 - alt. 25 m - After the ford over the stream - Rance (fleuve)
  4. 3 : km 1.11 - alt. 25 m - Tarmac road, on the right
  5. 4 : km 1.85 - alt. 41 m - Chapel of Val
  6. 5 : km 2.67 - alt. 91 m - Gravel path on the left
  7. 6 : km 3.61 - alt. 87 m - Intersection with the GR 34C
  8. 7 : km 4.7 - alt. 89 m - Callouet
  9. 8 : km 5.85 - alt. 49 m - Path on the right after the bridge
  10. 9 : km 7.35 - alt. 61 m - Ker Al Lann Holiday Village
  11. 10 : km 10.15 - alt. 48 m - La Suais picnic area
  12. 11 : km 11.35 - alt. 55 m - Grassy path on the right
  13. 12 : km 11.76 - alt. 53 m - Access to private property
  14. 13 : km 12.08 - alt. 58 m - Caution: balustrade on the left
  15. 14 : km 12.14 - alt. 59 m - Viewpoint over the lake
  16. 15 : km 12.51 - alt. 65 m - Jarnouën fountain
  17. 16 : km 14.37 - alt. 69 m - Confluence of the Rance and Néal rivers
  18. 17 : km 15.82 - alt. 79 m - Directional arrows
  19. S/E : km 16.04 - alt. 76 m - Rophemel dam car park

Worth a visit

Things to see on the route:
- the Chapel of Val (16th century),
- the uniquely shaped Rocher water tower,
- the rotating solar panels at Callouët,
- the Pont du Néal bridge,
- beaumont Castle and the bridge over the Rance,
- the Jarnouën fountain,
- the dam and station at Rophemel.

Nearby attractions:
- the 18th-century chimneys in the village of Guenroc: crowned, moulded, gendarme-hat style,
- the Guenroc Rock, near the cemetery.

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 16 reviews

Reliability of the description
3.9 / 5
Ease of following the route
3.9 / 5
Route interest
4.7 / 5
User 10914856

Overall rating : 2.7 / 5

Date of your route : May 22, 2025
Reliability of the description : ★★☆☆☆ Disappointing
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★★☆ Good
Very busy route : No

The route follows a section closed off by chains at one end and impassable gates at the other, between points 2 and 3 (before joining the small road).

Machine-translated

Picson06230
Picson06230

Overall rating : 4 / 5

Date of your route : May 22, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A very beautiful hike, very pleasant in spring.
The description of the first part up to marker 3 needs to be updated, as the fields up to the bridge over the Rance are now cultivated right up to their edges and no longer allow passage. A path that starts with steps carved into the earth and continues over boulders to the bridge provides a workaround for this change.
after the bridge, the path to the fields is blocked, and a new route starts on the right just after the bridge, allowing you to reach the hamlet just after marker 3 at GPS position N48° 19.384' W2° 03.580'.

Machine-translated

Phildel
Phildel

Overall rating : 4 / 5

Date of your route : Sep 16, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Beautiful hike, a little difficult at first to find the trail. Do not take the first path on the right (steps carved into the earth), but continue along the edge of the field

Machine-translated

jacques 35
jacques 35

Overall rating : 3.7 / 5

Date of your route : Jul 15, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A particularly physically demanding and difficult route, punctuated by short but very steep climbs and sometimes perilous descents
The start is unclear and we took a dangerous path that descended steeply when we should have taken a long detour along the road, which was not pleasant
Work on the dam makes the route unpredictable due to the closure of certain passages
Even the GPS track is not very clear

Machine-translated

Marco3588
Marco3588

Overall rating : 4 / 5

Date of your route : Jun 07, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent hike taken while the lake had been drained (dam repairs).
A water tower with very original architecture and the remains of houses submerged by the dam. Spectacular
Just a "small" correction: 18.8 km instead of the 16.04 km advertised
Signposting not always very clear, or even non-existent, but no problem following the GPS track

Machine-translated

Le gars Ben
Le gars Ben

Overall rating : 3.7 / 5

Date of your route : Oct 03, 2023
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

This hike is very interesting with superb views and quite technical in its first half. The only downside: the orientation at the start is quite problematic and even imprecise until you reach the Rance.

Machine-translated

Isaxo29
Isaxo29

Overall rating : 4.3 / 5

Date of your route : Jul 01, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The start and end of the hike are quite difficult, as brambles and ferns are currently very invasive along the first few kilometres.
The markings are not very well maintained, but the GPX was very useful.
The elevation gain indicated on the Visiorando website is not the same as what we experienced. Ours was 449 metres.
Despite all these issues, the hike was very enjoyable, in a beautiful wild area, a green setting by the water.

Machine-translated

De lanoe
De lanoe

Overall rating : 5 / 5

Date of your route : Jan 25, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Indeed, the start of the hike lacks landmarks. As someone who is familiar with the area, I asked myself the same question
After 1 km, it gets better. The route is busier
This hike is quite difficult and you need to be used to walking in these conditions. The elevation gain
is 426 m.
(FYI) The trail from the Néal bridge to the Rophemel dam and back served as
training before setting off on the Guerlédan trails.

That said, it's a magnificent hike that you'll want to do again and again.
The views over the reservoir are surprising

Machine-translated

Ricou et Domi
Ricou et Domi

Overall rating : 5 / 5

Date of your route : Jul 25, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Superb hike completed in 4 hours and 25 minutes
Quite difficult and not marked
Easy if you follow the trail
Be careful at the start, which is very uneven
A few obstacles across the path

Machine-translated

baj35
baj35

Overall rating : 3 / 5

Date of your route : Jun 14, 2021
Reliability of the description : ★★☆☆☆ Disappointing
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Hello, 186 metres of elevation gain??? 346 metres for me! I'd say it's fairly difficult, rather than average. The route lacks markings, which makes it very difficult to find your way with multiple tracks...

Machine-translated

Laurence44810
Laurence44810

Overall rating : 4.3 / 5

Date of your route : Mar 05, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful route that allowed me to discover a part of the 22nd arrondissement that I didn't know. Quite a physically demanding hike.
A very pleasant botanical trail with the colours of spring just beginning to appear. The Château de Beaumont is splendid.
I highly recommend it!

Machine-translated

danieldanben
danieldanben

Overall rating : 5 / 5

Date of your route : Aug 28, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

You need to be in good physical shape to do this hike, which involves fairly frequent ascents and descents.
You should also have good shoes and a walking stick to avoid slipping on the sometimes steep dirt slopes (when it rains).
I would recommend doing it in the opposite direction.
A very natural hike, with encounters with animals (hares, squirrels, birds, etc.).
Thanks to the author.

Machine-translated

snoullez
snoullez

Overall rating : 4.3 / 5

Date of your route : Aug 03, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

We did this route with a bivouac stop to test our new equipment :-)
Camping is possible around point 5, but overall, we could have gone further and found somewhere to pitch our tent, except around the holiday village.

The start of the route was a little worrying with a steep descent (we wondered if we had taken the wrong path). Once past the first bridge, it gets better.
The route is fairly clear and very well marked once you've passed the lake with the small shed. Before that, you have to think a little more at the intersections.

In terms of difficulty, it was more rugged than we had imagined, with fairly frequent ascents and descents. But it was manageable without too much difficulty once we had passed the first kilometre (as indicated by other comments)

Machine-translated

pepite22
pepite22

Overall rating : 4.7 / 5

Date of your route : Jul 19, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Hello,
A very shaded hike: ideal in hot weather with beautiful views of the lake
You need to be in good physical shape to do this hike, which is quite difficult, and you need good shoes to avoid slipping on the sometimes steep (not gentle) slopes, which are covered in dust.
At the start of the description: access to the trail is very steep, this part is not very busy, and vegetation covers most of the trail.
We started from the Néal pond in PLOUASNE in the direction indicated.
Thanks to the author and Visorando.

Machine-translated

isabellefroc
isabellefroc
• Edited:

Overall rating : 4 / 5

Date of your route : Jun 29, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Hello
A nice but quite difficult hike, but the weather was ideal as it was sunny and not too hot.
We had a few problems at the start and thought we'd taken a wrong turn because the sign said it was slightly downhill, but the slope was actually very steep. We turned back after 15 minutes and started again in the other direction. We ended up doing it backwards.
thank you for this route in any case.
Isabelle

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.