Couzon Dam, Les Roches de Marlin, Sainte-Croix-en-Jarez

Walk to the Roches de Marlin and return along the Lac du Couzon. On the way, you can visit the former Chartreuse de Sainte-Croix-en-Jarez.

Details

2169214
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 15.62 km
  • ◔
    Average duration: 5h 45 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 443 m
  • ↘
    Descent: - 436 m

  • ▲
    Highest point: 656 m
  • ▼
    Lowest point: 351 m

Photos

Description of the walk

Go to the Couzon Dam near Saint-Croix-en-Jarez and park near the dam.

(S/E) The hike starts on the right side of the dam, with the lake behind you. There is a hiking signpost at this location. Take the path that goes uphill (impasse de la maison du garde). When you reach the house after a few hundred metres, take the rocky path that goes sharply to the right. Follow this path. It is marked in yellow and white.
Continue straight ahead, following the markings. After passing under a high-voltage power line, the dirt path ends and becomes a tarmac road near a house.
Follow this tarmac road, still marked in yellow and white, passing under a second power line and arriving at a crossroads.

(1) Leave the yellow and white markings and turn right towards Couzelon, taking a small shortcut (dirt track on the right near a kind of buried tank with vent pipes) to cut across the bend in the Route du Couzelon. After a few metres on this track, you will find a picnic table on your right. At the top of the path, you will find the tarmac road to Couzelon and pass under the power line you crossed earlier.
When you reach Couzelon, the tarmac road ends and continues as a stony path, branching off to the right.

(2) After passing a farm and walking along a high wall made of large concrete blocks, turn left onto the path that goes uphill and ignore the one opposite. Pass under the first power line you crossed earlier.
Continue straight ahead, staying on the main path.

(3) When you reach a crossroads, turn right and continue straight ahead, ignoring the paths leading off to the left and right, to reach the Croix de Crème.

(4) At the Croix de Crème, continue straight ahead towards Les Roches de Marlin, as indicated on a hiking sign. Here you will find the yellow and white markings again.

(5) At the crossroads, turn right. Here, a signpost will again point you in the direction of Roches de Marlin. Turn right towards Roches de Marlin.

(6) At the crossroads, continue straight ahead for about 50 metres to reach the end of the Roches de Marlin site.

(7) Retrace your steps back to the previous crossroads.

(6) Turn right downhill towards Sainte-Croix-en-Jarez.

(8) At the crossroads, turn right and continue along this path.
The dirt track then becomes a tarmac road (Chemin de Vienne) and leads to a crossroads.

(9) Turn right, then a few metres further on, turn left (Route de Jurieux). The path is now marked in brown and white.

(10) In the left-hand bend, veer slightly to the right to admire the old chapel, then continue down the same road.
Continue along the road until you reach a larger road. The brown and white markings end here.
Cross this road carefully and take the small path on the other side, opposite the corner of the cemetery wall, which descends towards the charterhouse.
After crossing a small bridge (Chemin des Viviers), take the path on the left that runs alongside the buildings.

(11) At the crossroads, turn right into a tunnel-like passageway that will take you to the middle of one of the monastery's courtyards (Cour des Pères). Cross this courtyard and then turn left into a passageway that will lead you to the monastery's second courtyard (Cour des Frères). Continue on, exiting through the main gate.
When you leave the monastery, turn right. Ignore the road leading towards Pavezin. Pass a small car park on your right. Continue straight ahead, leaving the Route du Moulin on your right, and head towards a cross.

(12) At the cross, take the road on the right towards Seyoux. Continue along the tarmac road until you reach the entrance to the village of Seyoux.

(13) At the entrance to the village, at the first crossroads, take the road on your right (Route de Seyoux). At this point, a rustic sign indicates the direction of the Couzon Dam, but do not follow it as it indicates the direction of the dam for cars and you need to turn right, not straight ahead.
Continue for about 60 metres, then take the dirt track that descends to your right. A small handmade wooden sign indicates the direction of the dam. Continue downhill, turning right again.
You will arrive at the banks of the small Couzon river. The path is quite narrow at this point. Follow the river to the left, staying on the left bank, and ignore the small footbridge that crosses to the other side. The path gradually widens.

(14) You will arrive at the first dam and a small reservoir. Continue along the second, larger reservoir until you reach the main dam and the end of your hike (S/E).

Waypoints

  1. S/E : km 0 - alt. 353 m - Couzon Dam
  2. 1 : km 3.33 - alt. 410 m - Road junction
  3. 2 : km 3.91 - alt. 455 m - Fork in the road
  4. 3 : km 5.14 - alt. 582 m - Crossroads
  5. 4 : km 5.76 - alt. 585 m - Croix de Crème
  6. 5 : km 6.42 - alt. 610 m - Hiking signpost
  7. 6 : km 7.31 - alt. 654 m - Crossroads
  8. 7 : km 7.54 - alt. 622 m - Roches de Marlin.
  9. 8 : km 8.27 - alt. 587 m - Crossroads
  10. 9 : km 9.09 - alt. 487 m - Crossroads
  11. 10 : km 9.26 - alt. 475 m - Old Chapel
  12. 11 : km 10.4 - alt. 414 m - Tunnel passage leading to the courtyard - Chartreuse de Sainte-Croix-en-Jarez
  13. 12 : km 10.77 - alt. 423 m - Cross
  14. 13 : km 12.96 - alt. 425 m - Fork in the road
  15. 14 : km 13.93 - alt. 354 m - Small dam
  16. S/E : km 15.62 - alt. 353 m - Couzon Dam

Worth a visit

Visit to the Chartreuse de Sainte-Croix-en-Jarez.
The Couzon Dam reservoir.

Reviews and comments

4.7 / 5
Based on 14 reviews

Reliability of the description
4.7 / 5
Ease of following the route
4.7 / 5
Route interest
4.6 / 5
joma01
joma01

Overall rating : 5 / 5

Date of your route : Aug 15, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Followed the trail.
Pleasant route.

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catc73
catc73

Overall rating : 4.5 / 5

Date of your route : Jul 01, 2024
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant hike, with some lovely surprises

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Ludo68000
Ludo68000

Overall rating : 4.3 / 5

Date of your route : Sep 07, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Beautiful hike, mostly in the forest, with lovely open areas:
- stones at the Marlin Cross
- a very surprising village in Ste Croix
- artificial lake at the Couzon dam

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M Grisel
M Grisel

Overall rating : 5 / 5

Date of your route : Mar 13, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

We did the route on 12 March. It was grey in the morning but then the sun came out. Some parts were muddy (which is normal after a day of rain). We followed the route described without any difficulty, except for finding the rock with the cup marks, but we eventually found it. I had looked up the legends associated with it, as well as the magnificent Jurieux chapel, known as the chapel of fools (closed, unfortunately). It is a beautiful route that I recommend in the off-season.

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FlickaPatsy
FlickaPatsy

Overall rating : 5 / 5

Date of your route : May 01, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful and enjoyable hike that takes you through varied landscapes combining woods, streams and a dam. Distance of 17 km in 3 hours 30 minutes (travel time) with an elevation gain of 620 metres.
In our opinion, this hike can be optimised by starting from Sainte Croix en Jarez rather than the Couzon dam, which makes parking easier and allows you to enjoy excellent ice creams at the "Prieuré" on your return, particularly the vanilla/chartreuse flavour.
We tried to avoid roads and slightly modified the initial route. To do this, from the start in Sainte Croix, walk downhill from the car park for 50 metres, turn right at the crossroads onto a road and walk for 100 metres, then take the stony path on the right which leads to a tarmac road where you should turn right; after 300 metres and before a sharp left-hand bend, take a path on the right. You will come to a road which you should follow for 30 metres to the left, then turn right onto a marked path which you should follow until you reach a right-angle bend to the left. At the road, turn right back onto the original route. At point "2", you can take the path on the right, which is less steep and rejoins the original route at point "4". After point "10", in Thésay, at the end of the village, you can take a small path that climbs quite steeply to the left and joins a cross where you turn right. Then return to Sainte Croix, avoiding busy roads.

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toposrandos
toposrandos

Overall rating : 5 / 5

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

At Sainte-Croix, we took the Chemin de la Croix du Sud to avoid part of the tarmac road.
The route is very pleasant

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Yamaska
Yamaska

Overall rating : 4 / 5

Date of your route : Jan 13, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

thank you for this route suggestion

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maxcaviso
maxcaviso

Overall rating : 4.3 / 5

Date of your route : Jul 01, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★☆☆ Average
Very busy route : No

Not a very varied hike, lots of wide paths, few trails except on
the final section after Jarez.
The monastery is truly magnificent.

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ANNE2669
ANNE2669

Overall rating : 5 / 5

Date of your route : May 30, 2021
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful route offering varied landscapes. The arrival at the dam is very pleasant and provides some welcome relief from the heat.
To avoid tarmac, from Ste Croix en Jarez, we chose to climb up to the Croix du Sud (a fairly steep climb), then took a path on the right which allowed us to descend to the road at a mission cross. Just after this, turn right onto a path signposted Seyoux, which will join the road further down. This change to the route is only slightly longer but adds some elevation and offers a beautiful view at Croix du Sud.

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or69
or69

Overall rating : 5 / 5

Date of your route : May 30, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Beautiful and numerous views of Pilat and the Rhône Valley.
Many sections are exposed and high up, so avoid hiking in hot weather or strong winds.
The crossing of the Chartreuse is definitely worth it.
The explanations are exceptionally clear: well done!
Completed in 4 hours without breaks.
Thank you for this lovely route

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phmatho
phmatho

Overall rating : 4 / 5

Date of your route : Aug 11, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

It was really too hot, so we took a shortcut
At the cream cross, we took the path on the right, which brought us to STE CROIX more quickly.
Despite this, we had a good day
Take care

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LaurineGt
LaurineGt

Overall rating : 4.3 / 5

Date of your route : Jun 20, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful hike with varied landscapes!
Completed in 4 hours.
From the Couzon dam, you have to climb up to the Col de Marlin. The climb is longer than it is difficult and offers some beautiful views. This part of the trail is not very well known, so we were completely alone! Continue on to Jurieux, a charming little village with pretty houses and a cute little chapel, before arriving at the famous Chartreuse de Sainte Croix en Jarez! A must-see! During the week, there was hardly anyone there except the locals, but it's very busy at the weekend! We ended the hike with a pleasant walk through the woods before reaching the Couzon dam and following the water to the finish.

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Clemno
Clemno
• Edited:

Overall rating : 5 / 5

Date of your route : May 31, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Very nice route. Completed in 4 hours and 45 minutes by two adults, including breaks. Lots of open trails on the first half of the route: remember to bring a hat!

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dcava
dcava
• Edited:

Overall rating : 4.7 / 5

Date of your route : May 31, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Hike completed on Sunday, 31 May. Five hours at a leisurely family walking pace (not including lunch break).
Varied route with open sections, pretty forest passages and monuments including the chapel and the Carthusian monastery.
Easy to walk trail, or small roads with generally few cars.
The first part to Roches de Marlin is very quiet, while the Roches de Marlin, Sainte Croix and lake areas are much busier, but still reasonable.
Very precise description and GPS track.
A good outing in the part of Pilat closest to Lyon.
As a bonus at the end of May, you can pick cherries from the cherry trees that line the trail (most of which are wild/ungrafted).

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