From one height to another around Thilay

This hike offers a variety of routes, allowing you to visit the Roc la Tour and, perhaps, encounter the Dames de Semoy. Changes to the route between (8) and (10) were made on 27/7/2025 due to the closure of the Naux footbridge.

Details

4848371
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Last update:
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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.43 mi
  • ◔
    Average duration: 5h 05 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 1,401 ft
  • ↘
    Descent: - 1,388 ft

  • ▲
    Highest point: 1,345 ft
  • ▼
    Lowest point: 499 ft

Photos

Description of the walk

Starting point: Thilay Church

(S/E) From the church, take Rue Eva Thomé, then immediately turn left onto Rue de la Motte until you reach the war memorial. Turn onto Rue de la Roche, then very quickly turn left onto a path that climbs towards the cemetery.

(1) Facing the cemetery porch, head to the right to go round it until you reach the rear entrance.
Turn right, then take the first path on the left (crossing a small stream over a concrete slab).
At the first junction, head down to the left. The forest track runs above the Sources Blossette stream and joins the Blossette to Naux track.

(2) Ignore all signposting and head left between two pastures, heading north-west along a forest track.
Reach the path that runs along the edge of the state-owned forest, recognisable by its ditch and some markings on the trees.

(3) Turn left and keep heading in the same direction for as long as possible, taking care not to veer to the right after crossing a ditch. The path curves to the left, then branches off to the right before reaching a crossroads.

(4) Turn right, following the GR® signposts to the Roc la Tour site. Before exploring this remarkable site, take note of your bearings for the rest of the route.

(5) Do not continue north-west on the GR®, but start heading downwards, south-south-east, along a wide path, keeping an eye out for a small track on the left which you’ll come across very quickly; this runs alongside an administrative boundary (ditch). After 300 m, a path on the left takes you towards the boundary of some forest plots, with a conifer plantation on the left and a deciduous forest on the right.
Descend to the Route Forestière des Éteignères.

(6) Cross the forest road and take the path opposite until you reach the source of a small stream (a small wooden footbridge over the stream or its bed, depending on the season). Walk uphill for 30 m, ignore the path leading uphill to the left, head downhill to the right and, after two hairpin bends, join the Ruisseau de la Gire.

(7) Head down to the right, pass by the Moulin de la Gire, and continue in the same direction down to the Transemoisienne and the site of the former Naux railway station.

(8) Turn left onto the Transemoisienne, pass the confluence of the Ruisseau du Nantanru and the Semoy, then take the first path on the right to join the RD31 near the Pont de Nohan.

(9) Head right towards the bridge, cross it, then turn left immediately. At the start of the track, climb up the embankment to the right and continue to the Chemin de Nohan.

(10) Climb up the embankment opposite and continue along a lovely path overlooking the Semoy on the Crête des Dames de Semoy: this path is shown on OpenStreetMap Hiking and on the IGN map at a high zoom level. Reach a first viewpoint, then a second: views of Nohan, the ridge of Linchamps Castle and Newet, in the Hautes Rivières district.

(11) Take a small path on the right and head back down to a main track. Cross this track, pass under a high-voltage power line and descend to the Ruisseau de Narbruay.

(12) Head back up the opposite side, then turn right to join the RD131 at a hairpin bend. Follow it down to the right, take the left-hand bend and, at the next junction, turn left onto the D31 towards the bridge, which you cross to return to the church (S/E).

Waypoints

  1. S/E : mi 0 - alt. 499 ft - Thilay Church
  2. 1 : mi 0.3 - alt. 587 ft - Cemetery
  3. 2 : mi 1.2 - alt. 732 ft - Blossette path to Naux
  4. 3 : mi 1.47 - alt. 873 ft - State forest boundary
  5. 4 : mi 1.95 - alt. 797 ft - Junction of paths, including the GR16
  6. 5 : mi 2.92 - alt. 1,345 ft - Roc la Tour website
  7. 6 : mi 3.51 - alt. 1,076 ft - Route Forestière des Éteignières
  8. 7 : mi 4.37 - alt. 755 ft - Gire stream
  9. 8 : mi 4.83 - alt. 522 ft - Transsemoisienne and the former Naux railway station - Semoy (rivière)
  10. 9 : mi 6.05 - alt. 512 ft - RD31
  11. 10 : mi 6.5 - alt. 699 ft - Nohan Path
  12. 11 : mi 7.52 - alt. 968 ft - 2nd viewpoint at Les Dames de Semoy
  13. 12 : mi 8.02 - alt. 554 ft - Narbruay Stream
  14. S/E : mi 8.43 - alt. 499 ft - Thilay Church

Notes

  • Tables and benches 150 m from Roc la Tour.
  • Please note: the route of the GR® on the IGN map does not always correspond to the route on the ground.
  • The GR®16 has been unmarked since May 2018.
  • To check the dates for driven hunts: https://www.parc-naturel-ardennes.fr/cal

Worth a visit

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

4.6 / 5
Based on 7 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4.4 / 5
Route interest
4.9 / 5
User 8815717

A lovely walk through the woods with some elevation gain. Stunning scenery, a stream, springs and beautiful paths. This walk comes highly recommended.

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User 3452264

Overall rating : 4.7 / 5

Date of your route : Aug 18, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

very good app. I've been using it for years and am completely satisfied
i recommend it

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helene.
helene.
• Edited:

Overall rating : 5 / 5

Date of your route : Sep 30, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A superb route that takes you off the GR trails. This area is magnificent.
We hesitated a little between 6 and 7 and just before 11, but we shouldn't have: as we continued on, we found the paths that matched the description perfectly.
Thank you very much for sharing.

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la jot
la jot
• Edited:

Overall rating : 4.7 / 5

Date of your route : Apr 04, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

super detailed description, very useful, makes the IGN map unnecessary
Thank you

the only thing I couldn't find was point 11. I had to go off-road and go over rough terrain

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anteli
anteli
• Edited:

Overall rating : 3.3 / 5

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

we got lost at point 10

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jeanphilippeduplaix
jeanphilippeduplaix
• Edited:

Overall rating : 5 / 5

Date of your route : Mar 07, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Very beautiful route, we were familiar with the Roc la Tour side but it's always very pleasant. The Dames de Semois side was a new discovery, with superb views. To do and do again

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durandbob
durandbob
• Edited:

Overall rating : 4.7 / 5

Date of your route : Feb 21, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Pleasant hike, thank you

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