Source de Marthe and Source de l'Infernet

A circular route to visit two springs between Vitrolles and Les Pennes Mirabeau. The first is completely unknown because it is hidden in the hollow of a cliff with a humid and tropical atmosphere with its fig trees and brambles. The second is much better known. This circular route serves as a base from which to add detours to the ochre-coloured cliffs of Vitrolles or Urbex, the Fermes des Plaines d'Arbois and also the abandoned stadium.

Details

9525135
Creation:
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  • Walking
    Activity: Walking
  • ↔
    Distance: 7.01 km
  • ◔
    Average duration: 2h 25 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 149 m
  • ↘
    Descent: - 149 m

  • ▲
    Highest point: 215 m
  • ▼
    Lowest point: 85 m

Photos

Description of the walk

Park in the car park in front of the Crèche de la Renardière nursery. You can also park in the Renardière residential complex if there are no public parking spaces near the shops.

(S/E) Walk along the municipal pétanque court in Les Pennes Mirabeau on your left and continue for a few dozen metres. Cross the small bridge on your right to enter the residence, turn left, then left again to cross the field. Join the Chemin de Marthe Ouest and follow it to the right until you reach the inverted Y-shaped junction.

(1) Turn left at the hairpin bend and then climb, keeping to the left, until you reach the fire barrier.
The first part of the walk, which is about to begin, will be just as surprising, but much more rugged. It is therefore not recommended for very young children or elderly people.

Indeed, within a few metres, the landscape changes radically. There are no more flowers, but large trees with dense branches that the sun struggles to penetrate. The atmosphere quickly becomes cooler, even exotic. However, to get there, you have to take a steep path and rustic steps that lead to a kind of stone bridge where the Marthe spring is located.

(2) Continue climbing up to the Barnouins plateau. Once on the plateau, turn left and continue straight ahead until you reach a T-junction, where you turn right to join the Allée des Lauriers.

(3) Turn left for about 50 metres, then turn right, following the wall of a property on your right. Leave the tarmac road at the bend and continue straight ahead. The path slopes to the right and then joins a crossroads at an electricity pylon. Turn left and follow the power line.
Further on, descend to the right into the Ravin de la Cardeline.

(4) Climb back up to join Chemin des Vanades. Turn left, go through the fire barrier and descend to another electricity pylon.

(5) Descend to the right into the hollows, following the power line, until you reach the Source de l'Infernet. Turn left to reach it.

(6) Turn your back on the spring and head west. The path quickly turns south-west, then south, and eventually leads to Chemin des Pinchinades.

(7) Turn left and continue straight ahead until you reach the roundabout at the sports complex.

(8) Continue straight ahead, staying on Chemin des Pinchinades, and do the same at the next roundabout. Pass La Renardière primary school on your left and continue to the inverted Y-shaped crossroads.

Turn left onto Chemin du Pas de la Mue, ignore the dead end on the right, then turn right onto the next street to reach the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 102 m - Car park in front of Crèche de la Renardière
  2. 1 : km 0.49 - alt. 129 m - Junction, on the left
  3. 2 : km 0.94 - alt. 146 m - Source de Marthe
  4. 3 : km 1.91 - alt. 192 m - Allée des Lauriers, on the left
  5. 4 : km 2.98 - alt. 138 m - Ravin de la Cardelines
  6. 5 : km 3.65 - alt. 136 m - Electric pylon, on the right
  7. 6 : km 4.48 - alt. 103 m - Source de l'Infernet - Cadière (ruisseau) - Affluent de l'Étang de Bolmon
  8. 7 : km 5.43 - alt. 85 m - Chemin des Pinchinades, on the left
  9. 8 : km 6.09 - alt. 88 m - Roundabout, access to the educational farm
  10. S/E : km 7.01 - alt. 102 m - Car park in front of Crèche de la Renardière

Notes

I do not recommend this hike for young children or elderly people due to three obstacles: the rock staircase after the Source de Marthe, then a slippery slope to climb halfway along the route, and finally the mini cliff above the Infernet.

Worth a visit

(S/E) Municipal pétanque court in Les Pennes Mirabeau.

(8) Educational farm behind the Jean Roure stadium.

Reviews and comments

3.8 / 5
Based on 14 reviews

Reliability of the description
4 / 5
Ease of following the route
3.4 / 5
Route interest
4.1 / 5
Biquette13
Biquette13

Overall rating : 4.3 / 5

Date of your route : Nov 04, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A lovely, short and pleasant walk. No major difficulties except for a few steps.

I recommend visiting the old village of Les Pennes (around the church, chapel and under the ramparts).

To avoid the urban area along the road, I recommend continuing to follow the river to the Ferme de Croze, then the Font Blanche lake, passing under the motorway to climb up the rocky ridge via the Pas des Broquettes (this is the hill where Les Pennes is built). Following the ridge eastwards, you reach the village, passing three mills (two in ruins and one in good condition).
The route is then 15 km long, but almost entirely surrounded by greenery.

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mike-evy
mike-evy

Overall rating : 4.7 / 5

Date of your route : Sep 28, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent hike with beautiful scenery and points of interest
the only downside is the return journey by road, which is a shame

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jeannogues
jeannogues

Overall rating : 4.7 / 5

Date of your route : Jun 10, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very varied route starting in a wooded valley
then on a vast plateau in full sun since the fires
only a miraculously surviving pine tree offers a break in the shade in the middle
then it's downhill along the river Internet in the cool shade of the trees: pure bliss, it's very beautiful
The return to the starting point: it's tarmac...

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Sylve1977
Sylve1977

Overall rating : 4.7 / 5

Date of your route : May 10, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A superb hike done with a 9-year-old child. Moderate difficulty for those in reasonable physical condition. Superb, varied landscapes. The forest has disappeared, but this has opened up large spaces. Views stretching as far as the Étang de Berre lagoon. The section around the Cadière ravine is not easy as there are no markings and the path is not very clear on the ground. Using the PDF map helps.
A little forest, lots of rolling plateaus, springs... Really nice.
Do it in the suggested direction so you climb the steep slopes rather than descending them.
The last fifth of the hike is urban. But you have to get back to the starting point.

I recommend it!

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Isamc
Isamc

Overall rating : 4 / 5

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

The route was certainly magnificent before the fires that ravaged the region in recent years. It is very sad to see all these charred trees. The trees must have hidden all the electricity poles and human infrastructure.
The vegetation is growing back and scrubland is beginning to appear. Still, there are lovely scents of thyme and rosemary.
When we arrived at the source of the Infernet, there was graffiti... signs... "civilisation", in other words.

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jmvvisorando
jmvvisorando

Overall rating : 4.3 / 5

Date of your route : Jan 13, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike with a few difficulties. Access to the Marthe spring is not easy as you have to climb over a one-metre-high wall with few handholds. Then, at section 4, the path is not very clear and you have to climb upwards instinctively (not to be attempted in wet weather). At point 6, the descent from the hill to the spring is tricky. When you leave the La Cadière river, the return journey along the road to the starting point is, in my opinion, long and uninteresting. However, it is a magnificent hike because there are some stunning views.

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mexidoc
mexidoc

Overall rating : 4.3 / 5

Date of your route : Dec 07, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

The start (and end) in the city quickly gives way to fresh air and magnificent landscapes!
The route is not marked, but with GPS, you just need to follow the trail through the vegetation.
Make sure you have good shoes... And it's a feast for the eyes.

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louisiane
louisiane

Overall rating : 4.3 / 5

Date of your route : Nov 10, 2024
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

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POGGI GENEVIEVE
POGGI GENEVIEVE

Overall rating : 2.3 / 5

Date of your route : May 09, 2024
Reliability of the description : ★★☆☆☆ Disappointing
Ease of following the route : ★☆☆☆☆ Very disappointing
Route interest : ★★★★☆ Good
Very busy route : No

As the route is not signposted, more detailed information would have been necessary. Forced to turn back.

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rere
rere

Overall rating : 2 / 5

Date of your route : Nov 29, 2023
Reliability of the description : ★☆☆☆☆ Very disappointing
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★☆☆ Average
Very busy route : No

Completed on 29/11/23
This hike does not deserve to be rated "difficult" but should be rated "easy" or at most "moderate". There are absolutely no problems or difficulties in terms of the terrain; however, the route description is very difficult to follow. It is very poorly marked and the GPS track is of little use. I was forced to take an alternative route at point 6 in order to rejoin the trail. Part of the route runs under power lines that do not appear to be high voltage.
On the plus side, the route is completely deserted, so you're really alone and peaceful, which is great.

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sari13220
sari13220

Overall rating : 3 / 5

Date of your route : Oct 23, 2023
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★☆☆ Average
Very busy route : No

The last few kilometres are on a road and asphalt, which is not interesting. The start is poorly explained, so this is not a hike I would do again.

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Phil@13
Phil@13

Overall rating : 2.7 / 5

Date of your route : Apr 24, 2023
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★☆☆☆ Disappointing
Route interest : ★★★☆☆ Average
Very busy route : No

Walk starting from a residence, nice start to the hike in the valley, but once we reached the plateau, the directions provided were not precise or clear enough (for example: arrival at the T-junction... there were several...).
As a result, we 'deduced' from the map and missed the two springs indicated (at least one of them, the other probably being dry), shortening the hike in its most interesting part because the last third is just back to the starting point in the built-up area.

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Tagip
Tagip

Overall rating : 4.3 / 5

Date of your route : Oct 24, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

Easy hike, completed in two hours. The circular is well designed. Thank you for publishing it.

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Randonneur du dimanche
Randonneur du dimanche

Overall rating : 4 / 5

Date of your route : Mar 20, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A pleasant and original hike with beautiful views.
I think describing this hike as "difficult" is a gross exaggeration. I would say it is "easy" or, at most, "moderate".
The source of the Marthe, at the start of the route, is indeed inaccessible (brambles and undergrowth), and can only be glimpsed from a distance. On the second part of the route, there is no shade (so be careful in hot weather).

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