In the Mortehan forest: the four streams, La Roche au Sel, the Gros Chêne

22 October 2025: first part of the route revised due to the recent installation of a fence on a forest plot.

An exclusively forest route, sometimes wild, near Belgium. Especially in its first part, it takes in natural areas that are rarely visited. Modest streams have carved out a surprising landscape here.
La Roche au Sel, Le Gros Chêne, and L'Étang la Motte are worth a quick look in the second part of the route.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 12.43 km
  • ◔
    Average duration: 4h 10 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 223 m
  • ↘
    Descent: - 219 m

  • ▲
    Highest point: 427 m
  • ▼
    Lowest point: 328 m

Photos

Description of the walk

The Rochette car park, the starting point for this route, is easily accessible from the village of La Chapelle.
Leave the village in the direction of Bouillon, pass under the N58 E46 motorway and turn right onto the Route Forestière (RF) du Morthean.

(S/E) From the La Rochette car park, head south-west on the Route Forestière de la Première Tranchée for about 400 metres.
Take the first path on the left and descend to the Étang du Wargué.

(1) Of the five possible paths, take thefirst on the left (marked for mountain biking). Continue until you reach a nearby forest fence.

(2) Go up to the left along the fence, then turn left to reach the Ruisseau de la Roche d'Or.

(3) Continue along the path and, at the next junction, turn left to join the Route Forestière de la Fange aux Loups.
Turn left and follow it for 400 metres, then turn right onto a forest lane that borders plot 93.

(4) Initially stony, this lane becomes a path and then branches off to the left.
At the following crossroads, take the path on the right to reach the Ruisseau de la Fange aux Loups.

(5) Cross over the stream and take the right-hand path twice to follow the stream, first on the left bank and then on the right bank (there are some attractive rock formations on the left before you change banks).
At the next junction, take the path that branches off to the left (plots 54 and 89) to follow Rouge Ruisseau on its right bank. Climb up to a path on the right (yellow signpost at the fork) which allows you to cross Rouge Ruisseau.

(6). Cross the stream. At the next junction, continue in the same direction. At the second junction, turn left and then right to join two forest roads: on the right, the RF des Douze Cents, and on the left, the RF de la Laie de Villers (municipal boundary and national forest boundary).

(7) Take the RF de la Laie de Villers on the left for 700 m to reach the junction with the Route Forestière du Bel Aune. There are no signs for the Route Forestière on the ground.

(8) Turn left onto the RF du Bel Aune (straight ahead) until you reach the Route du Morthean.

(9) Cross it and take the main road opposite. After 300 m, before a steep descent, turn right and then immediately left. Shortly afterwards, pass under the Roche au Sel, a pretty block of quartz puddingstone.

(10) Continue eastwards. The path becomes more stony. Then turn left (90°) onto a straight path (heading north), then after 200 m, turn right onto a plot boundary (landmark: sign for plot 41) to join the Gros Chêne path.
Descend to the left (landmark: sign for plot 40) to Gros Chêne (basic shelter in poor condition nearby).
Please note: on the map, "Le Gros Chêne" indicates the car park. Follow the route and description carefully.

(11) Follow the mountain bike signs to the left without hesitation until you reach La Motte (directional signage). The path initially runs along the border with Belgium, then veers away from it before turning left. It then takes a grassy path on the right, at the end of which there are feeding troughs for deer, goes up to the left, then turns right towards La Motte.

(12) Turn right to go to the pond, then retrace your steps and follow mountain bike trails 13 to 16 to return to the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 401 m - La Rochette car park (RFdu Mortehan)
  2. 1 : km 0.92 - alt. 363 m - Étang du Wargué
  3. 2 : km 1.08 - alt. 359 m - Forest plot fence
  4. 3 : km 1.57 - alt. 377 m - Roche d'Or stream
  5. 4 : km 2.19 - alt. 401 m - On the right, forest path
  6. 5 : km 3.1 - alt. 376 m - Fange aux Loups stream
  7. 6 : km 4.35 - alt. 367 m - Crossing the Red Stream
  8. 7 : km 4.87 - alt. 392 m - RF de la Laie de Villers
  9. 8 : km 5.63 - alt. 413 m - RF Laie de Villers and RF du Bel Aune
  10. 9 : km 6.83 - alt. 427 m - Mortehan forest road (tarmac)
  11. 10 : km 7.27 - alt. 412 m - La Roche au Sel
  12. 11 : km 8.43 - alt. 344 m - The Gros Chêne
  13. 12 : km 11.58 - alt. 389 m - La Motte
  14. S/E : km 12.43 - alt. 401 m - La Rochette car park (RFdu Mortehan)

Notes

Basic shelter at the Gros Chêne.

Worth a visit

Relief shaped by streams.
La Roche au Sel (quartzite puddingstone)
The Big Oak, also known as the French Oak or Charles V Oak
The La Motte Pond

Reviews and comments

3.6 / 5
Based on 11 reviews

Reliability of the description
3.7 / 5
Ease of following the route
3.5 / 5
Route interest
3.7 / 5
ArinaTomberg
ArinaTomberg

Overall rating : 3 / 5

Date of your route : Aug 09, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★☆☆ Average
Very busy route : No

As keen hikers and regular users of Visorando, we were very surprised to find that this route differs so much from those we have been using for years. The route on the map is poorly marked.
At point 1, you have to take the left-hand path, as the other two paths are blocked further on.
Often, where the route is marked, there is simply no path. The GPS constantly loses track, sends warning signals and indicates false exits from the route.
The paths are very muddy in places, even in the middle of summer, which attracts mosquitoes.
Apart from the forest itself, there are no points of interest: no pretty villages, no chapels, no picturesque views — nothing that usually makes Visorando routes so enjoyable. With the exception of the dilapidated shelter at point 10, there is not a single bench or place to rest, as the route follows forest roads rather than actual walking trails.
And even what attracted us to this hike — the possibility of sheltering from the sun under the trees — did not live up to expectations: the wide, straight paths offer little shade.
In short, unless the creator of this route makes it more varied and clarifies the route, I cannot recommend it.

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User 26459837

Overall rating : 2.3 / 5

Date of your route : Jul 07, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★☆☆☆☆ Very disappointing
Route interest : ★★☆☆☆ Disappointing
Very busy route : No

Caution! The trail is not well marked and we got lost several times in the forest. In addition, after point two, a large fence blocks the trail! Fortunately, I had GPS to find my way back. The elevation gains do not correspond to reality... I do not recommend this hike.

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Didiet Parmentier
Didiet Parmentier

Overall rating : 3.7 / 5

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

If you just follow the route description, you won't get very far. In fact, it's easy to get lost in the woods; new paths have sometimes been created, and some paths are difficult to spot (especially when the weather conditions are poor, etc.).
Fortunately, with the paid version of Visorando, the route is displayed in blue on the overall itinerary in red; you are notified of any deviation. No complaints if you have this version.

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Cat08
Cat08

Overall rating : 4.3 / 5

Date of your route : Mar 20, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Beautiful hike, especially at the beginning between the stream and the rocks

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bozierbruno
bozierbruno

Good evening,
Thank you for your comment and clarification.
I will incorporate them shortly
Enjoy your walks
Bozierbruno

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jerome08090
jerome08090

Overall rating : 4 / 5

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

A very pleasant hike, especially when it's hot, as it was for me. The trail is 90% shaded.
I would like to add a few details about the signposting.
At point 9: When it says "turn right at the boundary of the plots", look for number 41 and turn right. Then "join the Gros Chêne path" by looking for the boundary of plot number 40. Go down to the left.
At point 10: The path along the border with Belgium is bordered on the right by a ditch and a fence put in place to combat swine fever.

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jp08200
jp08200

Overall rating : 2.7 / 5

Date of your route : Jul 04, 2020
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★☆☆☆ Disappointing
Very busy route : No

A route with little interest other than for clocking up mileage.
There's not much to discover except perhaps the pond at the end of the route.
The first third is on paths with tall grass almost up to your knees, which becomes tedious after a while.
The section after crossing the Mortéhan road is confusing, to say the least.

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Netra
Netra ★

Hello Didierisaso, and thank you for your comments.

I understand that you only moderately enjoyed this hike, no problem. However, what inaccuracies in the description led you to rate it as "Average"? Thank you in advance.

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Didierisaso
Didierisaso

Overall rating : 3 / 5

Date of your route : Jul 14, 2019
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★☆☆☆ Disappointing

for 14 July, it wasn't exactly a feast for the eyes. The hike was fairly easy with no real difficulties, but for us it lacked points of interest and was just walking for the sake of walking, which was a shame

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venerande
venerande

Overall rating : 4.3 / 5

Date of your route : May 21, 2018
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

beautiful hike in the forest along the rivers
a few points to add (at the lake): follow the mountain bike trail, taking the second path on your left)

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Corpia
Corpia
MagnonRando
MagnonRando

Overall rating : 4.3 / 5

Date of your route : Sep 23, 2017
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

A very good, fairly challenging hike! A few difficulties/ambiguities at the beginning in terms of finding your way, but once you get the hang of it, it's easy. The streams are really tiny, and the lake at stage 6? Didn't see it x)
Thanks for this route!
It's a shame we didn't see any animals and that we don't know anything about mushrooms :/ but the Sedan forest is lovely.

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Corpia
Corpia

Hello,
Yes, that's right. It's this passage:
(4) Initially stony, this path becomes grassy, passes near a small pond and turns left.
We turned left, perhaps too early, following the trace of an old path. We eventually found the Fange aux Loups stream. I can send you a waypoint. In any case, the walk was wonderful and we don't mind getting lost and yes, there were lots of mushrooms and a wide variety of flora.
Thanks!

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bozierbruno
bozierbruno

Thank you
Which section are you referring to?
Is it just before the passage about the Fange aux Loups stream?
There was indeed an error in the route, which I corrected a short while ago.
I hope you had the chance to find some porcini mushrooms or (another treat) to see some game (abundant in the wildest areas)

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Corpia
Corpia

Overall rating : 4.3 / 5

Date of your route : Aug 22, 2017
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good

The Sedan forest is renowned for its diverse landscapes. One section of the trail is no longer clearly marked, so a GPS device is recommended. However, it is a truly beautiful route with many discoveries to be made. Thank you!

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