Encountering Cretaceous mud worms in Sainte-Anne du Castellet

On this hike, we will approach La Roche Redonne from an original angle and describe fossil structures and a Roman bridge along the way.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 9.85 km
  • ◔
    Average duration: 3h 50 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 359 m
  • ↘
    Descent: - 360 m

  • ▲
    Highest point: 424 m
  • ▼
    Lowest point: 175 m

Photos

Description of the walk

If you are coming from Le Castellet, head towards "Le Brulat" (D26) and continue towards Sainte-Anne du Castellet, turning left onto the D246 before the village. Cross the village, take the Chemin du Moulin towards the Caday district, then the Chemin Fontaine de Marc. At the three-way junction, continue straight ahead on the unpaved road for about 200 metres until you pass below a farmhouse and cross a dirt track. At this point, turn left and park on the median below.

If you are coming from the Marseille road via Camp du Castellet, enter Sainte-Anne via the D87 and, after an S-bend, at the oratory, turn right onto Chemin du Moulin and follow the instructions above.

(S/E) Take the path that continues on from Chemin Fontaine de Marc.
From there, follow the route described in the Perrye83 hike until you reach La Roche Redonne.

(1) Note the presence of a very well-preserved paved slanting street over a stretch of several dozen metres. During this part of the route, you can also see the hills mistakenly named "Roche Redonne" on the IGN map at the top right: in fact, Roche Redonne is the one we will visit further on from our point 3 (near point 3 of the Perrye83 hike).

(2) At an elevation of approximately 355 metres, you will see a discreet path leading to the eastern face of the rock. Take this path and you will soon find yourself at the foot of the cliff, where a series of rock shelters known as "baumes" in Provence begins.

(3) After walking about 200 metres under the rock shelters, you will come out at the bottom of the slope that forms the western side of Roche Redonne. You can climb the slope to the top of the rock to enjoy a magnificent 360° panorama.
Take the path heading west and follow the route described by Perrye83.

(4) Instead of continuing along the main dirt track, take a dirt path that branches off to the right and after 50 metres passes the ruins of Camp de Penon, a badly damaged building and a well with a metal grille.

Continue along the path, which is initially earthy and then rocky, and stay on the ridge: three times you will pass a path on the right, always taking the left. It is on this section that you will see an abundance of fossilised burrows made by sandworms from the Cretaceous period. About 1.7 km after Camp de Penon, you will come to a straight track.

(5) Turn left, heading east, for 450 m before crossing a stream and catching a glimpse of the Roman bridge at Le Cannet on your right.

(6) Turn right onto a path which, after 150 m, crosses a track. Turn right again and after 150 m you will reach the Roman bridge.

(7) Take the track heading north-east and, after 450 m, you will pass the ruins of the Caday horse relay station, which is worth stopping to see. Continue for 100 m and you will come to the Font de Marc path. Take this path on the left to return to the car park (S/E).

Waypoints

  1. S/E : km 0 - alt. 181 m - Parking on a dirt esplanade
  2. 1 : km 1.93 - alt. 224 m - Paved slanting street
  3. 2 : km 3.54 - alt. 356 m - Path to the rock shelters
  4. 3 : km 3.88 - alt. 327 m - Towards the top of the hill
  5. 4 : km 6.26 - alt. 402 m - Dirt track on the right
  6. 5 : km 8.2 - alt. 215 m - Large track
  7. 6 : km 8.63 - alt. 201 m - Path on the right
  8. 7 : km 8.96 - alt. 189 m - Roman bridge
  9. S/E : km 9.85 - alt. 181 m - Parking on a dirt esplanade.

Notes

The only water source on the route is the Font de Mars. However, it is often frequented by wasps.
Good walking shoes are essential, as the paths are often very rocky.
Walking sticks are recommended.
The only shelter is the Roche Redonne caves. In the event of a storm, they can be useful... provided you happen to be there at the right time!
In any case, this hike is strongly discouraged if there is a risk of rain.

This hike shares a section with another hike published on Visorando by Perrye83, Sainte-Anne du Castellet - La Redonne - Les Fours. The two hikes each have their own unique sections and points of interest.

Worth a visit

Of course, the kilns (for cade, pitch and lime) are a must-see. For a description of these, please refer to Perrye83's hike.
The paved slanting street, after the descent from the pitch and lime kilns.
The numerous fossils, especially rudists, which are abundant at La Roche Redonne.
The fossilised burrows of mud worms from the Cretaceous period.
The Roman bridge (Pont du Cannet).
The illegal dump on the Capucine estate.

(1) In the limestone that makes up the path we take after descending from the kilns and the surrounding rocks, it is common to see fossils, particularly rudists. Also worth noting in this area is the paved slanting street, a limestone slab pavement whose quality of construction has allowed it to stand the test of time. This path was a communication route between Toulon and Marseille and was used to transport products from the kilns, among other things.

Please note that the path between the kilns and La Roche Redonne is often uneven and leaves little room to get out of the way if a mountain bike or, worse, a motorbike comes along, so be very cautious (as mountain bikers and motorcyclists rarely are).

(2) The caves at La Roche Redonne are impressive in size and shape, and it is worth taking the time to explore them. Some of them have been modified with dry stone walls.

(3) On the sloping surface of La Roche Redonne, you can see a large number of rudists, but they appear in longitudinal or transverse sections and it is not possible to collect them - unless you take a block of limestone! So we will just have to observe and photograph them.

From the ridge that we follow after the Penon camp, we will have a superb view of La Cadière, Saint-Cyr and La Ciotat, and closer by, the Faloubert valley.

It is also on this section that we will find traces of our famous Cretaceous mud worms: on the surface of the limestone slabs that make up the path, we can see 2-4 cm thick rolls, sometimes forming a network, which could be mistaken for fossilised roots, but are in fact the fossilised burrows of mud worms that lived on the seabed around 80 million years ago. These traces (which are part of what are known as ichnofossils - fossilised traces of the activity of living beings) are particularly abundant here.

Unfortunately, we can also see a horrible dump of various products, construction and agricultural waste, in the valley in front of us, on the edge of the Capucine estate. This hideous dump disfigures the landscape and endangers the Roman bridge, not to mention the depreciation of the nearby agricultural land (this is Bandol appellation territory, after all!): reporting it to the Tourist Office or the municipality can only be useful; I have already done so and am undoubtedly not the only one. We can always dream that the authorities will take notice...

(6) The Roman bridge, or Pont du Cannet, is very well preserved but is in danger of being submerged by the landfill, which is gaining ground.

Reviews and comments

4.5 / 5
Based on 13 reviews

Reliability of the description
4.4 / 5
Ease of following the route
4.4 / 5
Route interest
4.8 / 5
Alain Filipucci
Alain Filipucci

Overall rating : 5 / 5

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

Very interesting geographically/geologically and culturally, fairly easy for a regular hiker!

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Demanas
Demanas

Thanks for the info!
So it's "Encountering the burrows of Cretaceous mud worms"! 😊
I found it very interesting...

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stjo
stjo

@Demanas, it is not the worms that are fossilised, but their burrows.
Best regards.
stjo

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Demanas
Demanas

Overall rating : 4.3 / 5

Date of your route : Jun 20, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A pleasant hike with magnificent views of La Ciotat Bay, but still challenging as the ground is either sloping or stony, requiring constant vigilance.
The rock shelters, large fossilised worms and small Roman bridge are well worth a detour...

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jml13011
jml13011

Overall rating : 4 / 5

Date of your route : Mar 26, 2023
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A pleasant route with two very distinct sections: the climb, mostly through valleys dotted with a few points of interest (a spring, lime kilns and pitch kilns), beneath rocky outcrops.
Beautiful view from the top of the Redonne rock, ideal for a picnic (if it's not too windy).
After 2 or 3 km in the forest, the descent along a ridge offers a wide view of the sea, from La Ciotat to Cap Sicié.
Be sure to follow your map (or your GPS...).
I'm not sure about the Roman origins of the Roman bridge. I'm no expert, but it looks more medieval to me. That said, it's quite beautiful, so don't hesitate to take the 300 m detour.

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Autrautruche
Autrautruche

Overall rating : 4.3 / 5

Date of your route : Nov 30, 2022
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A superb hike with beautiful geological features that I would probably not have noticed without the description.
A few comments for future hikers:
-Do not take beginners on this hike as there are some steep, exposed and quite slippery sections (loose stones). I would have been more comfortable with my walking poles.
-Keep a close eye on your GPS as there are many paths that cross each other.
-you can hear the Castellet route, which is not surprising for the area. It didn't bother me too much.
Thank you for introducing me to this area.

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rando7
rando7

Overall rating : 4.7 / 5

Date of your route : Feb 23, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

:

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Fibie83
Fibie83

Overall rating : 5 / 5

Date of your route : Feb 14, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

A very beautiful hike full of wonderful discoveries, with two distinct environments making this hike particularly appealing.

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JeanVar
JeanVar

Overall rating : 4 / 5

Date of your route : Dec 27, 2021
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A well-designed route, alternating between heath and forest. The main attraction of this hike is discovering the rock shelters. I found the second half of the hike a little monotonous (but perhaps I should have taken a second break after the first one on the Roche Redonne slope). To find your way, it is essential to use GPS (thank you Visorando! ), which provides reliable directions, with one exception: on the steep slope approaching Roche Redonne, do not rely on the app, as the trailhead on the left is a few metres before you reach the top of the slope.

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CARLE
CARLE

Overall rating : 5 / 5

Date of your route : May 09, 2021
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

beautiful hike, but be careful as there are very few markings. Luckily, I was hiking with the route on my phone. Don't miss the ovens and 360° panoramic views of La Ciotat Bay. Bring sun protection as the paths are often exposed. Wear good shoes and bring walking sticks as the paths are very, very rocky and often uphill

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chrissmeounes
chrissmeounes

Overall rating : 4.3 / 5

Date of your route : Mar 12, 2020
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A very interesting hike because it offers such a variety of heritage and geological discoveries. The only downside was that a red cross at the foot of La Roche Redonne misled us and we ended up walking an extra 2 km over difficult scree, only to realise
that we had made a mistake and had to turn back.

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Aapef
Aapef

Overall rating : 5 / 5

Date of your route : Feb 18, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

A superb walk with no real difficulties (let's say two big climbs on large gravel, which makes it seem more difficult), two very distinct parts: the first six kilometres up the hill with pretty canyons, and the last part with a superb view of the golf course.
My dog and I approve

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Ludicus
Ludicus

Overall rating : 4.3 / 5

Date of your route : Jan 19, 2020
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

I did the hike with my 15-year-old daughter. There were some beautiful passages under the rock, but we couldn't find the discreet path leading there. However, knowing that we had to head towards the rock, we took a wide path that goes around it, climbing steeply. There really are some superb passages under the rocks!
It seemed to us that the climb to the north after the rock, before taking the ridge path south towards the Penon camp, was longer than it appeared on the map...
In any case, it was an excellent walk and, good news, the landfill is being rehabilitated!

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henri57
henri57 ★

Hello,

Thank you for your feedback.

Did you have any problems with the description and layout? If so, how can we fix it? Can you give us some suggestions?

See you soon

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jeanmorb
jeanmorb

Overall rating : 3.7 / 5

Date of your route : Nov 28, 2019
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good

nice walk. Some interesting remains (cade ovens, pitch ovens, etc.)

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