Bonnan Valley Trail

Landscapes of cliffs and valleys in the Bonnan valley and the Grézelles forest. This route only uses paths and tracks in the middle of unspoilt nature.

This is the classic version of the Vallée de Bonnan trail, as described in the Tarn à pied guidebook and on the FFRP information sheets.

Details

1684622
Creation:
Last update:
Last review:
  • Walking
    Activity: Walking
  • ↔
    Distance: 11.68 km
  • ◔
    Average duration: 4h 20 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 342 m
  • ↘
    Descent: - 334 m

  • ▲
    Highest point: 448 m
  • ▼
    Lowest point: 138 m

Photos

Description of the walk

Park in the car park of the Milhars community hall.

The entire route is very well marked, with occasional signs for the Bonnan Valley.

Yellow markings - Vallée de Bonnan

(S/E) On the D600, with your back to the community hall, turn left towards Place de la Mairie. In front of the community café, cross the road and turn right. This uphill street passes two stone calvaries.

(1) At the third wrought-iron cross with a broken left branch, turn left towards Bournazel and pass the farm. In front of the water catchment, veer right and climb towards Cantegrel. Go through a gate and close it behind you. The path winds its way to Pech Busque.

(2) At elevation 349, ignore the path coming from the right and continue climbing, crossing Grézelles Basses.

(3) Turn left onto the tarmac road. At the T-junction, there are two PR® signs opposite. Follow the signs for Vallée de Bonnan on the right, heading south then south-west. Pass Grézelles Hautes. Cross Pézatgé. Approach Les Fontanelles. You have now reached the highest point of the route.

(4) Turn right to walk between Les Fontanelles and Les Peyrouses. Pass elevation 443 and descend about 300 metres. Pay attention to the markings.

(5) Before Viou Noble, turn right. Pass a crossroads, continuing north-northwest. You will reach another crossroads at 350m.

(6) Continue descending north towards the ruins of La Forêt. Cross a meadow after this hamlet. The trail follows a wide curve to the left at the edge of the forest and descends further. After passing the first hairpin bend to the right, go through a gate. At the hairpin bend to the left, cross a ford at the foot of large granite rocks.

(7) At the T-junction with a wide track, turn right. The track passes in front of the ruins of the Madeleine Chapel and sarcophagus. Continue along the almost flat path to the bridge crossing the Bonnan Stream.

(8) At the trail signposts, follow the PR® Vallée de Bonnan trail to the left and cross the bridge. Continue to the right towards the petrified waterfall. In summer, the waterfall is dry, but in winter, the spring flows abundantly or is covered with stalactites in case of frost. It is possible to walk up to its source.

(9) Tufa waterfall. Continue along the stream until you reach the next bridge and cross it. Note, just before the bend towards the bridge, a huge, centuries-old elm tree on the right.

(10) At the T-junction, turn left. The wide dirt track leads to the tarmac road.

(11) Continue along the road uphill opposite and stay on this road to find the white wrought iron cross from the outward journey.

(1) Retrace your steps to return to the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 138 m - Car park of the community hall.
  2. 1 : km 0.99 - alt. 179 m - White wrought iron cross in Bournazel
  3. 2 : km 2.9 - alt. 349 m - Pech Busque
  4. 3 : km 3.73 - alt. 391 m - Grézelles Basses
  5. 4 : km 4.85 - alt. 440 m - Le Pézatgé
  6. 5 : km 5.95 - alt. 432 m - Avant Viou Noble
  7. 6 : km 6.56 - alt. 384 m - Descent towards the forest.
  8. 7 : km 7.7 - alt. 264 m - Crossroads in front of the Bonnan Stream.
  9. 8 : km 8.31 - alt. 201 m - Fork in the road before the bridge.
  10. 9 : km 8.42 - alt. 196 m - Tufa waterfall - Cascade de Bonnan
  11. 10 : km 10.07 - alt. 157 m - T-junction
  12. 11 : km 10.49 - alt. 151 m - Tarmac road near the last bridge.
  13. S/E : km 11.68 - alt. 138 m - Car park of the community hall.

Notes

Water fountain and toilets in the car park of the Milhars community hall.

Route completed by the author on 9 January 2019.

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

4.7 / 5
Based on 11 reviews

Reliability of the description
5 / 5
Ease of following the route
4.9 / 5
Route interest
4.3 / 5
julien1983
julien1983

Overall rating : 4.3 / 5

Date of your route : Jun 16, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

It's a shame that the petrifying waterfall is dry and the sign needs replacing.
The car park at the start has been redesigned, thank you to the local council.

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montagnejeanmarc
montagnejeanmarc

Overall rating : 4.7 / 5

Date of your route : Mar 17, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Nice route, very well marked; the waterfall is a beautiful sight... It's a shame that the ruins of the chapel aren't shown off to their best advantage...

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petites jambes
petites jambes

Overall rating : 5 / 5

Date of your route : Sep 26, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant walk, perfectly shaded (28 degrees in September!). Beautiful scenery, dry riverbeds and, to finish or start, the "old" medieval village of Milhars.

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dammartin
dammartin

Overall rating : 4.7 / 5

Date of your route : Jun 22, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A very interesting nature route.
The surprising village of Milhars to finish off.

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°Carpediem°
°Carpediem°

Overall rating : 5 / 5

Date of your route : Apr 06, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A route surrounded by nature with beautiful views and the magnificent village of Milhars as a reward. The route is perfectly marked, but sometimes you have to stray a few metres off the path to make some wonderful discoveries... Unfortunately, the waterfall was dry despite the recent rains.

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Digol
Digol

Overall rating : 4.7 / 5

Date of your route : Jan 16, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The village of Roussayrolles is worth a slight detour from the suggested route: it has a very beautiful little church.

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CHAMOIS84
CHAMOIS84

Overall rating : 4.7 / 5

Date of your route : Aug 13, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Very well marked, shaded trail. The only regrets were the slightly hazy horizon and the waterfall without water... A very beautiful route to discover.

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delelis
delelis

Overall rating : 4.7 / 5

Date of your route : Mar 14, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

Very pleasant hike with beautiful panoramic views in the first part. Waterfall completely dry despite the season.

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Sylvie foulhoux
Sylvie foulhoux

Overall rating : 5 / 5

Date of your route : Feb 21, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A short, very pleasant walk with no particular difficulties in terms of signposting or physical exertion... after the heavy rains, the waterfall was beautiful to see!!!

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kinou1273visorando
kinou1273visorando

Overall rating : 4.7 / 5

Date of your route : Oct 20, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A very pleasant, accessible short route (very little tarmac) between the Grézelles Forest and the Bonnan dry valley (at the time of our visit).
Thanks to the author.

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madydou
madydou ★

Hello Jomad,
Thanks for the feedback.

The marked trail starts on the right, in front of the water intake, whose blue door is visible from the path.
This photo was taken at the corner of the path that branches off to the right and climbs up to the ridge.

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jomad
jomad

Overall rating : 4.7 / 5

Date of your route : Mar 31, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good

A lovely route between the limestone plateau and the valley. Very well signposted.

Between points 1 and 2, the marked path does not follow the indicated route. On the climb, it does not turn right but continues straight ahead along the ridge.

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