The leat de la Chaille

A family hike around Les Rousses will take you to the Fort des Rousses, the old redoubt, the waterfall and the leat de la Chaille valley.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 10.02 km
  • ◔
    Average duration: 3h 25 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 189 m
  • ↘
    Descent: - 189 m

  • ▲
    Highest point: 1,156 m
  • ▼
    Lowest point: 995 m

Photos

Description of the walk

Parking is available at the Les Rousses Tourist Office on the RN5.

(S/E) From the Tourist Office, head towards Fort des Rousses. To do this, carefully cross the RN5 following the white/redGR® markings, then follow the road on the right to "Les Rousses Centre" at the square in front of the sports shop.

(1) Turn left and go up the small dirt road that leads to the ski jump. Continue to the right towards the Porte de France, admiring the Fort des Rousses site. At the crossroads, turn right towards the car park.

(2) Turn left and follow theGR® trail, leaving Rue des Entrepreneurs on your right and heading down towards leat de la Chaille. Continue to the crossroads with the road at a place called Le Sagy Haut (see Practical Information section).

(3) At Sagy-Haut, cross the tarmac road carefully and take the small stony path opposite, which descends towards the leat de la Chaille stream. Continue straight ahead, heading south, passing the Bonzon and Sous le Saut crossroads to reach the footbridge crossroads.

(4) Do not cross the footbridge, but take the path on the left that climbs back up towards the leat de la Chaille. At the Cascade signpost, you can take the yellow-marked path to the waterfall and back. Then rejoin theGR® and continue to the right to reach the leat de la Chaille.

(5) At the leat de la Chaille crossroads, head towards the tarmac road and turn right. Walk past the youth hostel. Continue for about 500 metres until you reach a small road.

(6) Go down the small road on the right that crosses the river. In the bend that follows, take the Chemin du Bagon on the left. The route climbs back up to Les Cressonnières via a dirt track that is often wet, then via a fairly steep tarmac road, and meets the RD29.

(7) At Les Cressonnières, turn left and walk carefully along the RD29 towards Les Piles. On the straight stretch, cross the road carefully to stay on the right side. Continue to the left-hand bend. Enter the housing estate by turning right onto Rue des Piles, which climbs towards Rue de la Frontière (D1005).

(8) Continue on the left to reach the Lacuzon roundabout. Keep right on Rue de la Frontière and follow the signs for La Cure. Pass the French customs post and continue on the right towards Les Rousses, following the yellow markings.

(9) At the crossroads, turn left and then take the first right onto Route Royale. Keep heading north, passing the two access roads to houses on your right, until you reach the Chez le Queton crossroads.

(10) Turn right towards Le Brioland via Chemin des Marguerites. Ignore the paths leading off to the right. Continue for a few dozen metres after the junction with Route du Brioland.

(11) Turn left towards Montée de l'Opticien. As you continue, look to your right for a mound that hides an old redoubt belonging to the former defensive system of Les Rousses. Take Montée de l'Opticien, a legendary passageway in the famous Transjurassienne cross-country ski race.

When you reach Rue Pasteur, turn left and you will find the Les Rousses Tourist Office (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,111 m - Tourist Office - Follow &gt - Fort des Rousses
  2. 1 : km 0.14 - alt. 1,110 m - Les Rousses Centre
  3. 2 : km 0.55 - alt. 1,119 m - Porte de France
  4. 3 : km 1.59 - alt. 1,046 m - Le Sagy Haut
  5. 4 : km 3.24 - alt. 995 m - Footbridge - Possible visit to the - Cascade du bief de la Chaille
  6. 5 : km 3.73 - alt. 1,043 m - Leat de la Chaille
  7. 6 : km 4.16 - alt. 1,071 m - To the right towards the river
  8. 7 : km 5.27 - alt. 1,125 m - RD29 crossroads
  9. 8 : km 6.19 - alt. 1,155 m - Rue de la Frontière (D1005)
  10. 9 : km 6.85 - alt. 1,148 m - Crossroads, on the left
  11. 10 : km 8.36 - alt. 1,112 m - At Queton
  12. 11 : km 9.42 - alt. 1,119 m - Le Brioland
  13. S/E : km 10.02 - alt. 1,111 m - Tourist Office

Notes

"Le Sagy" can be translated as "le Saut du Gy", a saut being a rock above a precipice, and a gy a steeply sloping corridor through which loggers slid spruce logs. Le Sagy is located in precisely this configuration and it is likely that in the past it was used to transport spruce trees via the leat de la Chaille and then the Bienne.

 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 21 reviews

Reliability of the description
4.6 / 5
Ease of following the route
4.2 / 5
Route interest
3.9 / 5
Cancale
Cancale

Overall rating : 3.7 / 5

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

Risk of error at the entrance to the Piles housing estate, which is marked as private property. It is less visible because it is on a bend, and the road to follow is 20 metres further on.
Otherwise, the route is uninteresting, with little to see.

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virginie guichard
virginie guichard

Overall rating : 4.7 / 5

Date of your route : Nov 11, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Pleasant hike without any particular difficulty

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de jaegher
de jaegher

Overall rating : 4.3 / 5

Date of your route : Sep 06, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A lovely walk. As we were staying near point 8, we set off from there.
there were lots of wooded areas, which was pleasant.
there weren't many landmarks on the circuit (lack of signposting or poor signposting)
the return trip by road was a bit inconvenient.

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Otra vida
Otra vida

Overall rating : 3.3 / 5

Date of your route : Aug 12, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★☆☆☆ Disappointing
Very busy route : No

Too much road, too hot in the mouth with the road. Choose an AR instead

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Edmond G.
Edmond G.

Overall rating : 4.7 / 5

Date of your route : Jul 22, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The start of the walk is very interesting, but the return journey by road is a little long and more tedious.
Please note that at point 2, construction work is slightly altering the route indicated, but the path is easy to find.

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Chat21250
Chat21250

Overall rating : 3.7 / 5

Date of your route : Jul 15, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : Yes

The first part was superb in the countryside, but the second part was along the road 😤

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jp.cael
jp.cael

Overall rating : 4 / 5

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

Not very busy on Thursday, 30 May, in the rain. Be careful, roots and stones are very slippery.
But a beautiful walk, with beautiful scenery and beautiful waterfalls.

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jesuisenrandonné07
jesuisenrandonné07

Overall rating : 4 / 5

Date of your route : May 03, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Review the departure point as there is construction work underway at point 2
Be careful at point 6. Do not take the first tarmac road that goes down to the farm, which is what we did. We ended up in Prémanon D'amont, which made the hike longer. We walked 16 km, but we did not regret this detour because of the beautiful scenery
At La Cure, there is traffic, of course. As for the small road on the way back, there is little traffic

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dominique.pourchayre
dominique.pourchayre
• Edited:

the first part around the fort was very good, but then there was far too much driving. Going to the border at La Cure is of no interest whatsoever

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spinoza2009
spinoza2009

Overall rating : 3.3 / 5

Date of your route : Jan 22, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★☆☆ Average
Very busy route : No

Path closed due to construction work at the beginning. You have to take a detour through a small wood a few dozen metres further downhill to rejoin the GR trail.
Too much tarmac for the return to Les Rousses.

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JG71
JG71

Overall rating : 3.7 / 5

Date of your route : Jul 17, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★☆☆☆☆ Very disappointing
Very busy route : Yes

On a 10 km course, the first 5 km are in the woods. Great. But the last 5 km are on roads, including a main road: not so great

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mauricejeannine
mauricejeannine

Overall rating : 5 / 5

Date of your route : Jun 12, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : No

The start of the GR trail leading to leat de la Chaille is closed due to major construction work at the Centre. After walking the commando route several times in an attempt to find the alternative route from the ski jump as described on a small poster, we went to the tourist office.
Here's how to get there: I leave from the tourist office, which I have just left. So it's behind me. Take the path to the left of the square towards the centre, passing in front of the "Au soin de soi" shop, then turn left: you are now on Rue des Entrepreneurs (the street just before the crossroads with the Route Départementale). Follow Rue des Entrepreneurs to the end, where the beautiful forest trail (GR) begins, leading to leat de la Chaille and its magnificent waterfall.
If you climb a hundred metres or so, you will reach the place called leat de la Chaille and, from there, you can either continue on the route described by Visorando (turning right), turn left to return to Les Rousses via a small road, or, as we did, return to Les Rousses via the same beautiful route we took on the way there.

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Patrice et Hélène
Patrice et Hélène

Overall rating : 5 / 5

Date of your route : Nov 11, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Lovely autumn walk. The first third is in the woods, the rest is in the sunshine! Brilliant!

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raycharles
raycharles

Overall rating : 4 / 5

Date of your route : Aug 10, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Nothing to report

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pat du 10
pat du 10

Overall rating : 4.7 / 5

Date of your route : Aug 31, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Lovely walk, shame about the rather dangerous section of road

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