The Great Chimney

Forest walk in the hills above Syam to discover the Grande Cheminée, an open-air cave that was visited in the Bronze Age. An axe made of this metal was found there. According to some, you may be walking on the lost site of Alesia as you make your way to two viewpoints over the wild Saine valley.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.68 km
  • ◔
    Average duration: 3h 35 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 398 m
  • ↘
    Descent: - 390 m

  • ▲
    Highest point: 785 m
  • ▼
    Lowest point: 532 m

Photos

Description of the walk

Park on the D279, after Syam, heading towards La Billaude, at the start of the hike, on the left after the bridge over the Saine. White, red and yellow markings.

(S/E) Turn your back to the departmental road and take the "chemin interdit sauf riverain" (path prohibited except for residents) towards Chaux-les-Crotenay. At the nearby fork, turn right onto the gravel road.

(1) When the path begins to descend, take a sharp left turn to continue climbing. After a short climb, join a gravel road, turning left and following the Étang des Perchettes.

(2) Immediately after the pond, at the signpost, head back into the woods via the gravel path on the right.

(3) After another climb, the path reaches a small plateau at a triangular crossroads. Turn left to make a round trip to the Grande Cheminée.

(4) Be careful! If you glance quickly at the trail, you will think that the path continues, disappearing into this picturesque stone arch. Don't be fooled into going there. These few metres of stone in this damp place look slippery and treacherous to me, and it would be very stupid to break your back to avoid these two short trips to the chimney.
So turn back quietly.

(3) Turn left and take the small tarmac road, descending to the left towards the Pré Grillet viewpoint.

(5) When it turns sharply to the right, look for the path on the left that takes you back and forth to the foot of beautiful cliffs and back to the Grande Cheminée (below), which you can climb up using log steps.

(5) On your way back, still following the curve, take the path on the left towards the viewpoint. Return to the bend and descend about 50 metres before turning left again into the woods towards the Taiclet viewpoint. Stay on this well-marked yellow trail.

(6) After the second viewpoint, you will begin to descend, joining a gravel forest road. Follow it downhill to the left (towards Syam - Les Prés Grillets).

(7) Just before this road forks, take a path on the left. If you miss it, turn left at the next fork. The path becomes a little less pleasant and leads to a small paved road, which you take to the left. It runs alongside the river.

(8) Just before returning to the car park, you can take a path on the right at the edge of the Saine to cool off (S/E).

Waypoints

  1. S/E : km 0 - alt. 533 m - Pont de la Saine car park. The path runs alongside the - Lemme (rivière)
  2. 1 : km 1.36 - alt. 620 m - Turn left at the hairpin bend uphill
  3. 2 : km 2.1 - alt. 692 m - Étang des Perchettes
  4. 3 : km 2.5 - alt. 758 m - Towards the Grande Cheminée
  5. 4 : km 2.77 - alt. 751 m - The Great Chimney
  6. 5 : km 3.98 - alt. 714 m - Belvédère du Pré Grillet.
  7. 6 : km 5.59 - alt. 745 m - Viewpoint at Taiclet.
  8. 7 : km 6.57 - alt. 685 m - Les Prés Grillets
  9. 8 : km 8.31 - alt. 536 m - The - Saine (rivière)
  10. S/E : km 8.68 - alt. 533 m - Pont de la Saine car park

Notes

At point (4), if you look quickly at the trail, you will think that the path continues, rushing into this picturesque stone arch. Do not be foolhardy enough to go there, as these few metres of rock in this damp place seem slippery and treacherous to me.

Worth a visit

The Cascades de la Billaude or Saut Claude Roy, one of the most picturesque sites in the Jura, at the bottom of the steep gorges of the Lemme. Two successive waterfalls totalling 28 metres in height gush from a narrow crack in the middle of the cliffs.

From the car park, head left up the D279.

Reviews and comments

4.2 / 5
Based on 28 reviews

Reliability of the description
4.1 / 5
Ease of following the route
4 / 5
Route interest
4.6 / 5
elisabethhartmann
elisabethhartmann
• Edited:

Overall rating : 3.7 / 5

Date of your route : Sep 01, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

The descent down the chimney, although impressive and slippery, is quick and easy, and the detour along a small, very pleasant path means there is no need to turn back. Of course, caution and care are the norm
on the way back, there is a very pleasant picnic table overlooking the Saine and its pretty, multi-coloured song, with water made very joyful by the recent rains. A magnificent route before visiting the Palladian villa in Syam, another gem in a sublime green setting, which is not to be missed.
On Sunday 31 August, summer was not yet over.

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BenoleCizo
BenoleCizo

Overall rating : 4 / 5

Date of your route : Jan 27, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

Very nice hike, with some elevation gain in the first part and beautiful views.
There are a few deviations from the route halfway through, but it's fairly easy to find your way back.
Be careful around the chimney, it's very slippery in wet weather.

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fguy39
fguy39

Overall rating : 4.3 / 5

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

the trail does not always follow the route, which sometimes makes it difficult to know which direction to take. The descent from the Grande Cheminée is well secured with handrails and metal steps, which makes it easy to access, especially when climbing. Beautiful views: lookout points, the Perchettes pond, etc.

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jijir
jijir

Overall rating : 3.7 / 5

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

This is a challenging hike with some steep climbs!
It can be difficult to find the large chimney via the upper access point (point no. 3) as the path is poorly marked and very steep. It is easier to access from below (point no. 5)

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Andre M
Andre M

Overall rating : 3.3 / 5

Date of your route : Mar 31, 2024
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

Hike completed on 31 March, made difficult by steep, wet, slippery trails damaged by logging. (Hike only to be undertaken in dry weather). We were unable to find access to the large chimney via No. 3. We reached it via No. 5 by following the "Trail" sign. Afterwards, there were two beautiful viewpoints.

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nelloche
nelloche

Overall rating : 4.3 / 5

Date of your route : Oct 05, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Be careful at the start. We didn't see that the path turned left before the large piles of wood, and neither did anyone else. As a result, we went round in circles at the beginning, but after that there were no problems. A very pleasant route when the weather is warm

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Baladeuse66
Baladeuse66

Overall rating : 3.7 / 5

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

A beautiful hike in the forest, with several climbs.
Short coffee break at the Perchettes pond. After that, it gets complicated compared to the description and the GPS is not very helpful.
We approached the large chimney a bit "by chance" from above, following the fluorescent pink mountain bike trail. My father made the round trip through the chimney using the cables and ladders in the rock.
Then we returned via the arrival trail.
We couldn't find the access point "at the foot of the large cliffs" in 5.
Two viewpoints, Pré Grillet and Taiclet, are not to be missed.
The place is very pleasant, cool and shaded.
Don't miss a visit to the Villa Palladienne de SYAM with its particularly interesting history, in a magnificent setting, linked to the Forges just a stone's throw from the estate.

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piccolopripri
piccolopripri

Overall rating : 5 / 5

Date of your route : Aug 12, 2021
Reliability of the description : Not used / Not applicable
Ease of following the route : Not used / Not applicable
Route interest : ★★★★★ Very good
Very busy route : No

The chimney is now well equipped. Great! This hike is really interesting. However, you need to be used to "aerial" routes: arches serving as steps in the rock face, handrails and access points (when going in the opposite direction) that must be approached with great caution. Good path on the side of the slope but very steep.
I DID THE ROUTE IN THE OPPOSITE DIRECTION to the suggested route (and I'm glad I did). IT'S EASIER TO CLIMB UP THE CHIMNEY THAN DOWN, so the highlight of the hike is at the end of the route.
Very good in hot weather, almost always in the shade.

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Bidou61
Bidou61

Overall rating : 3 / 5

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

Hike done in the opposite direction to that described. The Grande Cheminée, which is the theme of the hike, is very nice, well equipped and does not present any particular difficulties on the way up for hikers who are used to this type of exercise. However, we had quite a few difficulties with the route (luckily we had a smartphone with a good GPS app). This was partly due to forestry work and partly to the random layout of the trails on the maps. We mostly followed the PR marked in yellow. Near the viewpoint at Taiclet (incorrectly marked on the map), we spotted some chamois (silence recommended ). At the end of the route, a pile of logs being watered made the trail impassable (muddy +++ and rain gear required!!). Otherwise, a very nice hike.

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Bordom
Bordom

Overall rating : 4.3 / 5

Date of your route : Oct 18, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Having taken the wrong path after the pond, we reached the chimney from the "wrong" side – the one that the route description advises against following after visiting the chimney. We therefore crossed the chimney from top to bottom, via a short passage that was a little challenging but well equipped with cables and pins.

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Balou du jura
Balou du jura

Overall rating : 4.3 / 5

Date of your route : Sep 12, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

I did the route in reverse order, following the river first and then climbing all the way up in one go over 2 to 2.5 km. I then looked around a bit for the large chimney, but once I found it, I didn't think it would be difficult for experienced walkers. I did this hike again the following week in the correct direction, but that's just my opinion; I prefer doing it backwards because the view of the large chimney when you arrive is superb.

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fourmis
fourmis

Overall rating : 4.7 / 5

Date of your route : Sep 10, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant and peaceful route.
At point 2, the signpost is called "Le sapin président" (the president's tree). At this point, we preferred to follow the yellow sign pointing to the Grande Cheminée (large chimney) 0.9 km away, which avoids the detour at point 3. We therefore took the path up to the right of the chimney, which corresponds to the return route in the description.We did as suggested in point 5: a return trip to the base of the Cheminée, which allowed us to see that it was easy to cross as cables and steps had recently been installed. We tested this and it worked! In other words, you can avoid the small tarmac road by going down into the Cheminée (see photo).
In point 7, the road is short and more pleasant than described, as you can cool off in the river!

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Garigou
Garigou

Overall rating : 4 / 5

Date of your route : Aug 26, 2020
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful hike in the heart of the forest, requiring relatively sustained effort, especially at the start!
Some confusion may arise at times due to the use of narrative and non-concrete terms, and the meaning of words may be surprising, making you wonder if you are still on the right track!
The word "climb" to describe the start of the route is clearly inappropriate, as it is more than 1 km long and has a 100 m elevation gain!
But apart from these minor points, the signposting and marking have been done with a great deal of "paternalism" and the best has been done in a context that is, let's face it, not easy to achieve.
A very beautiful hike!
Thank you for clearing the way for us!

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Viennet
Viennet

Overall rating : 4 / 5

Date of your route : Aug 24, 2020
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

The short "climb" mentioned at the start of the route is actually about 1 km long, so it would be good to mention this. The description as it stands could lead to confusion about the route. Otherwise, it's a lovely little route through a beautiful forest with a river at the end.

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le papy
le papy

Overall rating : 3.7 / 5

Date of your route : Jul 06, 2020
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

in the forest, the path disappears

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