The secrets of the Grand Bois

An easy walk in the forest, refreshing on summer days, in the heart of the Pilat Regional Nature Park, to discover the somewhat secret sites of the Grand Bois.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 7.94 km
  • ◔
    Average duration: 2h 45 
  • ▲
    Difficulty: Easy

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 174 m
  • ↘
    Descent: - 170 m

  • ▲
    Highest point: 1,313 m
  • ▼
    Lowest point: 1,157 m

Photos

Description of the walk

Departure: car park at the Tremplin leisure area in Bessat.

(S/E) Take the tarmac road that extends from the access road. After the hangar, it continues along a path. Continue straight ahead.

(1) At the crossroads, turn right onto theGR®42, which joins theGR®7and follows the same route. Continue straight ahead on this GR®.

(2) At the Croix des Fosses, turn right onto theGR®7-GR®42.

(3) At the Creux du Loup crossroads, turn left onto theGR®42. An area of young plantations follows the forest. Leave theGR®42, which descends to the left, and continue straight ahead. After about 200 metres, you will find a faint path on the right that leads into the woods.

(4) Follow this path, despite a few branches blocking the way. The path winds and climbs to an altitude of 1,316 metres: Les Rochettes, the highest point of the Grand Bois.

(5) On the way down, leave the path and head right through the woods to a large charcoal burner's pothole. There is another one further to the right. Then rejoin the path below and turn right.

(6) At the crossroads, take the path on the right. Continue straight ahead at the first crossroads and continue to the next crossroads.

(7) At the Bourdouse crossroads, turn right, then immediately left onto a moderately downhill path.

(8) You will reach a wider path running perpendicular to this one. Turn right and continue to the Maison des Gardes.

(9) After the house, at the fork, take the path downhill to the left. About 400 m further on (elevation 1159), take the path on the right, which generally stays on the hillside. You will reach a crossroads with a small clearing.

(10) Optional: at this crossroads, you can quickly reach the Grotte Sarrasinière, a simple shallow hole at the foot of a rocky embankment. Take the path on the left (not marked on the map) and try to spot the rock on the left in the woods, but it is not easy to find. Return to the crossroads and turn left, continuing straight ahead to quickly reach the starting point (S/E).

Waypoints

  1. S/E : km 0 - alt. 1,157 m - Tremplin Recreation Area, near the - Furan (rivière)
  2. 1 : km 0.4 - alt. 1,196 m - GR42 crossroads
  3. 2 : km 1.31 - alt. 1,276 m - Croix des Fosses
  4. 3 : km 2.18 - alt. 1,276 m - Creux du Loup
  5. 4 : km 2.77 - alt. 1,289 m - Path on the right
  6. 5 : km 2.96 - alt. 1,312 m - Les Rochettes
  7. 6 : km 3.62 - alt. 1,267 m - Turn right at the crossroads
  8. 7 : km 4.61 - alt. 1,259 m - Bourdouse crossroads
  9. 8 : km 5.16 - alt. 1,188 m - T-junction
  10. 9 : km 6.09 - alt. 1,178 m - Junction at the Maison des Gardes
  11. 10 : km 7.04 - alt. 1,173 m - Crossroads
  12. S/E : km 7.94 - alt. 1,157 m - Tremplin Recreation Area

Notes

(4) This detour is optional; you can also continue straight ahead without taking the path on the right.

Shelter available in the Maison des Gardes.

Worth a visit

At the start, note the ruins of a ski jump on the right, which gave the site its name.

(2) Croix des Fosses: commemorates a legendary battle during the Wars of Religion. Protestants are said to have buried their dead here, while Catholics buried theirs at a place called Le Mort, at the entrance to Le Bessat.

(3) Creux du Loup: according to legend, this was the lair of an enormous wolf that terrorised the region. However, Creux can mean crossroads, and loup often comes from the confusion between the Latin Lupus (wolf) and Lucus (sacred wood). Creux du Loup would therefore be the crossroads of the sacred wood. However, this area of the Grand Bois is called Bois Paradis.

Les Rochettes: a large, picturesque rock that fascinated Jean du Choul when he visited Pilat around 1550.

Marmites des charbonniers: remains of the boilers that were once used to make charcoal.

Bachat de Bourdouse: one of five bachats preserved in the Grand Bois to serve as a water source (drinkability not guaranteed!).

Maison des Gardes: accommodation for the guards who monitored the water catchments used to supply the city of Saint-Étienne.

La Sarrasinière: possibly the exit of a medieval underground passage leading from the Château du Toil.

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 24 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.7 / 5
Route interest
4.6 / 5
karoll691
karoll691

Overall rating : 5 / 5

Date of your route : Feb 21, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Route on a snow-covered path, very pleasant and without any difficulties!

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Patberpilat
Patberpilat

Thank you for your positive review. The path leading to Les Rochettes is not very well marked under normal circumstances, so it makes sense that you couldn't find it under the snow. Try again when the weather is nice for a completely different experience...

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dioude3971
dioude3971

Overall rating : 4.3 / 5

Date of your route : Jan 10, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Circular loop through the snow, just before the "official" opening of the cross-country ski trails. Magnificent woodland scenery, enveloped in silence... except for the crunch of fresh snow underfoot!
The only downside was that we couldn't find the path to point 4 (elevation 1316, Les Rochettes), so we went straight to point 5.

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michelemounier
michelemounier

we followed the route without any problems
very reliable app, ideal route in hot weather

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monique delunel
monique delunel

Overall rating : 4.7 / 5

Date of your route : Sep 22, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Difficulty finding the right car park to start from. Otherwise, very good.

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DDx
DDx

Overall rating : 4.5 / 5

Date of your route : Mar 31, 2025
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Good route for the spring break.
The routes in Visorando are always top notch.
I can't do without the app anymore! I'm addicted.
Well done,
Daniel

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lolopouic
lolopouic

Overall rating : 5 / 5

Date of your route : Nov 04, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Thank you very much for this wonderful walk full of discoveries. I really enjoyed it and would like to thank the Visorandonneur who organised this hike. I learnt so much along the way

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Chris43
Chris43

Overall rating : 5 / 5

Date of your route : Aug 20, 2024
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

Beautiful route through the forest. Little elevation gain and mostly good paths. Particularly interesting in this very hot weather as it is well shaded. Thank you

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michelemounier
michelemounier

Overall rating : 5 / 5

Date of your route : Aug 08, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

at the last pond, broom has grown and the path on the left is almost invisible
listen carefully to the circuit alert

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moi0742
moi0742

Overall rating : 4.7 / 5

Date of your route : Aug 05, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A very beautiful hike with lovely views. Quite shady, which is appreciated during periods of intense heat.

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dsalles
dsalles

Overall rating : 4.7 / 5

Date of your route : Jul 30, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Easy hike through beautiful woods.

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jk
jk

Overall rating : 4 / 5

Date of your route : Oct 01, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : Yes

Be very careful: at the Bourdouse crossroads, turn right and then IMMEDIATELY left onto a very narrow path at the foot of the signpost.
A very beautiful hike.

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pat_piz
pat_piz

Overall rating : 4.7 / 5

Date of your route : Aug 21, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

This hike is very accessible with no major difficulties, and the coolness of the woods at 1,200 metres is very welcome in hot weather. There are quite a few paths that cross each other in the large forest, but if you follow the signs, you'll find your way. Personally, I downloaded a GPX track onto my GPS to make my life easier. Thank you for this lovely, enjoyable walk ☺️

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DUCOTTERD
DUCOTTERD

Overall rating : 5 / 5

Date of your route : Aug 15, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Excellent short hike with little elevation gain. Great for children or seniors. The only requirement is good footwear.

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hwehrlin
hwehrlin

Overall rating : 4.7 / 5

Date of your route : Jan 17, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

It had snowed during the night, but the snow only began a few kilometres from the starting point of the walk. We were surprised to find ourselves in fresh snow, with no tracks before ours, in silence... magical, thanks to the author of the route.
Hélène

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