Ridges of the Plateau de Sèze and Mont Trésor in the Côtes massif

This route is quite challenging as it passes over several ridges of Mont Trésor and the heights of the Plateau de Séze. The slopes are sometimes quite rugged. This area is wild and very quiet, but it offers views over the Durance valley to the Alpilles and the southern mountains of the department.
Please note: the elevation gain is closer to 520 metres.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 12.92 km
  • ◔
    Average duration: 4h 55 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 433 m
  • ↘
    Descent: - 430 m

  • ▲
    Highest point: 430 m
  • ▼
    Lowest point: 214 m
  • ⚐ Country: France
  • ⚐ District: Lambesc (13410)
  • ⚑
    Start/End: N 43.693837° / E 5.249947°
  • ❏
    IGN map(s): Ref. 3143ET, 3143OT
  • Hour-by-hour weather

Photos

Description of the walk

To get to the start, from Lambesc towards Charleval, follow the D67 to a small pass just after passing under a high-voltage power line. Park on the left at the start of the track.

(S/E) Take the path that leads south from the track, running alongside the D67 below. Cross an asphalt track and continue straight ahead. Join the D67, cross it and continue on the slightly downhill track. Walk along a field on your left, then make a circular turn to the right to reach the bottom of the valley.
After the circular, ignore a path branching off to the left and continue following the bottom of the valley.

(1) At the crossroads with a transverse track, take the path on the left going up at the bottom of the valley. Ignore the turnings on the right or left until you come to a fork with a path on the right just before a left-hand bend. Beware of the prickly vegetation.

(2) Follow the well-marked path to the right until you reach the ridge. This section is difficult due to the slope and the stony terrain.
At the top, ignore the path that follows the ridge and descend opposite until you reach the top of a field. In the valley, climb up to the ridge.

(3) Leave the DFCI track on your right and continue on the left towards the electricity pylon. Follow the ridge, ignoring the various paths on either side, pass between two rocky peaks and climb the steps to reach the plateau.

(4) On the plateau, take a small path on the right that goes through the bushes and continue on this single track until you reach a cliff with an unobstructed view.

(5) Go to the end, then backtrack slightly and continue on the right between the bushes, following the edge of the plateau. At the end, begin the descent and return to the starting point.

(S/E) Back at the car park, continue along the path that branches off to the right along the ridge overlooking the road. At the three-way junction that follows, leave the ridge and continue to the right, following the road above.

(6) At the end of the path, with the road in sight, immediately turn left onto the descending path. At the end of this wooded path, rejoin the DFCI and follow it straight ahead for about 200 metres until you reach the Bergerie de Mont Trésor, a very pleasant spot in summer for its shade and for a snack break.
Then take the DFCI back the way you came.

(7) After visiting the sheepfold, return along the DFCI for about 100 metres.

(7), at this point you will need to take the second path on the right. This will lead you through somewhat overgrown vegetation on a faint trail that is difficult to see in places. After making a wide right turn, cross the top of a field and a few metres later turn left. Follow the path at the bottom of the valley, then veer off to the right and join a track. Continue along this track until you reach a right-hand bend a few metres from the wide track.

(8) Continue on the left, following the top of the path, which climbs a little steeply. Then descend into the valley, start the climb opposite and, just before it gets steeper, find a path on the right and follow it to reach the next shoulder.

(9) Descend to the right and follow the path to make a round trip to Cuou de Peyrou, which is the major historical feature of this hike. These are the remains of an old cliff-side walking path with a spiral staircase carved into the rock that led to the entrance of a mine tunnel (Cuou or cul de chaudron in Provençal, which describes the shape of the rock after a mine explosion).
Please note: it is strongly advised not to venture beyond the staircase, as the structure is very old and in poor condition, making it unsafe to continue
On your return, continue climbing, find the path you left earlier a little further down and continue to the right until you reach the ridge.

(10) Continue to the right and stay on the ridge, ignoring the various side paths. Pass a small pass (elevation 267) and continue straight ahead to the summit. Almost at the end of the summit, on the descent, you will reach a three-way junction. Take the sharp left turn and continue under the ridge along the path that leads to the valley. Follow this path, ignoring two paths on the right, and continue to the third path.

(11) Climb up the main path and reach the ridge.

(12) Leave the main path and take the trail going up to the left. Once you reach the hilltop, enjoy the view back towards the Château des Taillades and continue along the ridge to the car park. The path is still very hilly and at the top, enjoy beautiful views of the Durance valley, the Alpilles, the Lubéron and the surrounding mountains, before returning to the car park on the edge of the D67 (S/E).

Waypoints

  1. S/E : km 0 - alt. 383 m - Parking is available at the roadside
  2. 1 : km 2.13 - alt. 295 m - Crossing track, on the left
  3. 2 : km 2.71 - alt. 331 m - Take the path on the right towards the ridge
  4. 3 : km 3.14 - alt. 392 m - Fork in the road, left
  5. 4 : km 3.78 - alt. 430 m - Plateau, path through the shrubs
  6. 5 : km 4.22 - alt. 412 m - Château Valebonette viewpoint
  7. 6 : km 5.69 - alt. 349 m - Turn left downhill
  8. 7 : km 6.35 - alt. 318 m - Return trip to Bergerie
  9. 8 : km 7.3 - alt. 280 m - Path climbing to the left
  10. 9 : km 7.84 - alt. 260 m - Fork in the road, Cuou de Peyrou
  11. 10 : km 8.81 - alt. 328 m - Ridge, on the right
  12. 11 : km 10.9 - alt. 221 m - Wide path on the right
  13. 12 : km 11.16 - alt. 258 m - Ridge, on the left
  14. S/E : km 12.92 - alt. 384 m - Parking is available at the roadside

Notes

Note: the direction of the route is designed to limit the number of steep descents.
It is entirely feasible to walk in the opposite direction to enjoy the scenery, but it is harder on the knees.

The advertised elevation gain of 390 m is actually closer to 520 m, which should be taken into account.
There are no water sources along the route and in summer it is very hot in the valleys and the ridges are constantly in the sun.
Bring long sleeves and trousers for the section between (1) and (2), as the vegetation is abundant and very prickly.
At the beginning and end of the season, bring warm clothing as it is often windy and sometimes foggy at the bottom of the valley.
This route is not recommended for animals, and may be difficult for children as it is very hilly and steep.
Wear high-top hiking boots and take care with your ankles.
If you take the route in the opposite direction, we recommend stopping for a snack at the Bergerie de Mont Trésor, which is halfway along the route (7). The area is equipped with stone benches and tables and is very well shaded in summer.

Worth a visit

(4) On the way up, you may sometimes see small goats on the rocky peak below the electricity pylon.

View of the valley and the Château de Valbonnette below.

The Cuou de Peyrou is a remarkable remnant of a cliffside walkway, but it is not accessible. However, you can admire the workmanship of the spiral staircase carved into the rock.

(12) Take a break and turn around to admire the Château des Taillades (Lambesc) and its architecture, which is rich in history and easy to find on the internet.

Reviews and comments

4.3 / 5
Based on 19 reviews

Reliability of the description
4.2 / 5
Ease of following the route
4.4 / 5
Route interest
4.5 / 5
Adelheid
Adelheid
• Edited:

Overall rating : 4 / 5

Date of your route : Feb 24, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A very beautiful hike, but difficult to follow without a GPS (or the Visorando app), as there are many small paths branching off to the right and left.
Apart from a few cyclists on the D67, we didn't meet anyone else on the route.
We saw a goat where it was "supposed" to be (on the rocky peak below the electricity pylon) and a partridge. The broom was in bloom, which added to the beauty of the landscape.
A beautiful route that comes highly recommended.

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Doremi 13
Doremi 13

Overall rating : 3.5 / 5

Date of your route : Feb 23, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : Not used / Not applicable
Route interest : ★★★☆☆ Average
Very busy route : No

A pleasant walk with a variety of trails (sometimes on ridges, sometimes in the forest). On that day, the wind was quite strong, which was noticeable on the ridges. Contrary to what the author says, the elevation gain is more like 390 metres, and the distance covered was 13.7 km according to my Sportractive software.
No notable technical difficulties on the route.

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monique m
monique m

Overall rating : 5 / 5

Date of your route : Jan 12, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Magnificent hike, all trails, incredible views. Very convenient circular loop since you can leave your picnic in the cars and pick it up to eat a little higher up at the sheepfold. Don't miss the "cuou de peyrou". Thanks to the author of this trail.

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Fontenotte
Fontenotte

Overall rating : 4.3 / 5

Date of your route : May 29, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

The first part will soon be impassable, as the vegetation is encroaching on the narrow path. The second part is easier and more pleasant at first, but I find the end a bit long and monotonous, which is a shame.

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fanny84
fanny84

Overall rating : 4.7 / 5

Date of your route : Feb 09, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Hello, we went there yesterday, in beautiful weather after the rain
We started out above the fog, it was very beautiful. The trails are quite visible and marked by footpaths and not too overgrown.
There are some steep slopes, but they are short, and you go up and down all the way.
There are varied landscapes and beautiful views of the entire region, the Petit and Grand Luberon, the Alpilles, the Étang de Berre and even, at Mont Trésor, the sparkling sea
Don't miss the Cuou de Peyrou, the short round trip is really worth the detour.
We had a snack at La Bergerie, so we picked up our picnic on the way back to the cars. There is a concrete table and benches under a canopy, which is sunny depending on the time of day.
I recommend this beautiful, rich and varied hike, which is not technically difficult.
Dogs need to be agile, as there are a few rocky passages. Our mascot for the day, a Briard crossbreed who is used to hiking, coped very well.

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Jean Rmb
Jean Rmb

Overall rating : 5 / 5

Date of your route : Mar 23, 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

Hike completed on 23 March 2024: magnificent, many thanks to DGuillon!
- The first circular of about 5 km: vegetation is closing in on these little-used paths between points 1 and 4... it's quite thorny and soon, if nothing is done, they will unfortunately no longer be accessible. I had a pair of secateurs and cut back quite a few branches, but it's not enough to ensure this path will remain accessible for a few more years.
- The second circular is simply splendid, approximately 7 km long: after a stop at the sheepfold for a picnic, the trail runs exclusively along ridges between point 7 and the finish. There is an almost constant 360° view, with the Durance valley and the Luberon massif on one side, and on the other, a view of the plains and massifs as far as the Côte Bleue, the Étoile massif, Sainte Victoire, and even the Étang de Berre and the sea at the Gulf of Fos (towards the end of the hike).
A very beautiful hike, never technical, but requiring a certain level of fitness, to be done on a day in autumn/winter/early spring, without too much Mistral wind and outside the hot season as it is never covered by trees.

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dishdash
dishdash

Overall rating : 3.7 / 5

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

A pleasant hike for a rather leisurely stroll in the hills.
Two or three steep slopes, but short.
The scenery is pretty, without being exceptional, and you'll appreciate the variety of vegetation depending on the location.
The route, although not very intuitive, is well designed.

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phimag1
phimag1

Overall rating : 5 / 5

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

GPS guidance essential: no signposts.
Very beautiful route, lovely views.

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fragon
fragon

Overall rating : 4.7 / 5

Date of your route : Dec 06, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A somewhat challenging but very accessible and varied hike. Beautiful views.

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dguillon
dguillon

Hello, Elise.
Thank you for leaving a comment.
You didn't see many markings, did you? That's normal, as this route is mostly off the beaten track because it's a bit challenging, but that's the whole point. It allows you to get back in touch with map reading and orientation skills. It also allows you to observe the environment.
I assume you enjoyed it.

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Elise/marius
Elise/marius
• Edited:

Overall rating : 4 / 5

Date of your route : Oct 11, 2021
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

No markings or very few.
Thank you, GPS Visorando
Very steep, so quite challenging
Still worth doing.
Very beautiful views
Le Cuou de Peyrou
The sheepfold
The Château des Taillades

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dguillon
dguillon

Good evening, Danyy, thank you for taking the time to share your impressions of this course. Visitor numbers are fairly low throughout the year. It's a lesser-known area than La Roque d'Antheron, but just as enjoyable to discover in all its raw beauty.
Thank you again, and we're delighted that everything went well for you and your companions.

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danyy
danyy

Overall rating : 5 / 5

Date of your route : Mar 26, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A beautiful, undulating hike, not very busy for March, with stunning views and remarkable sights not to be missed (Le Cuou de Peyrou, the Château de Valbonnette and Château des Taillades, not to mention the picnic area at Bergerie du Mont Trésor).
And indeed, as announced, the elevation gain is over 500 metres!

Thank you for sharing this hike, which was greatly appreciated by the group of walkers

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dguillon
dguillon

Hello,
Thank you for your comment. That's the advantage of a figure-of-eight route: you can choose to do just part of it, and this section is also very interesting because the plateau and the surrounding area have a very rich historical past dating back to the Second World War. I'll leave you to do some research, which is easy to find if you have a little time.

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mc013
mc013

Overall rating : 4.5 / 5

Date of your route : Apr 11, 2021
Reliability of the description : Not used / Not applicable
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A hike less than 10 km from our home that we didn't know about. I only did the first half (just under 6 km), which offers beautiful views of the Étang de Berre lagoon and beyond. A varied route, we even came across three wild boar piglets. Very quiet, we found enough to make a delicious omelette with wild asparagus...

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