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: 6.12 mi
  • ◔
    Average duration: 3h 50 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 1,178 ft
  • ↘
    Descent: - 1,181 ft

  • ▲
    Highest point: 1,391 ft
  • ▼
    Lowest point: 574 ft

Photos

Description of the walk

If you’re coming from Le Castellet, head towards “Le Brulat” (D26) and carry on towards Sainte-Anne du Castellet, then take the D246 on the left just before the village. Go through the village, take the Chemin du Moulin towards the Caday neighbourhood, then the Chemin Fontaine de Marc. At a three-way junction, carry on straight ahead along the now unpaved track for about 200 metres, until you pass below a farmhouse and come to a dirt track. At this point, turn left and park on the lay-by 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 a wayside shrine, turn right onto the Chemin du Moulin, then follow the instructions above.

(S/E) Take the path that continues on from the Chemin Fontaine de Marc.
From there, follow the route described in the Perrye83 walk, right up to where it approaches the Roche Redonne.

(1) Note the presence of a very well-preserved paved slanting street over a stretch of a few dozen metres. During this part of the route, you can also see, top right, the hills erroneously labelled “Roche Redonne” on the IGN map: in fact, the Roche Redonne is the one we will be visiting further on, starting from our point 3 (near point 3 of the Perrye83 walk).

(2) At an elevation of approximately 355, you’ll see a faint path leading towards the eastern face of the rock. Take this path and you’ll soon find yourself at the foot of the cliff, where a series of rock shelters—known as ‘baumes’ in Provence—begins.

(3) After walking for about 200 metres beneath the rock shelters, you emerge at the bottom of the slope that forms the western face of the Roche Redonne. You can climb this slope to the summit of the rock to take in 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 diagonally to the right and, after 50 m, passes close to the ruins of Camp de Penon – a heavily dilapidated building and a well covered with a wire mesh.

Carry on along the track, which is initially earthy then rocky, and stay on the ridge: on three occasions, you’ll pass a path on your right and always take the left-hand route. It is along this stretch that you’ll see an abundance of fossilised burrows of Cretaceous sandworms. About 1.7 km after Camp de Penon, you’ll come across a straight track.

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

(6) Turn right onto a path which, after 150 metres, crosses a track. Turn right again to reach the Roman bridge after 150 metres.

(7) Return to the track heading north-east and, after 450 metres, you’ll pass the ruins of the Caday horse post station, which is well worth a stop. Continue for 100 metres and you’ll come to the Chemin de la Font de Marc; take this on the left to return to the car park (S/E).

Waypoints

  1. S/E : mi 0 - alt. 594 ft - Car park on a dirt esplanade
  2. 1 : mi 1.2 - alt. 735 ft - Paved slanting street
  3. 2 : mi 2.2 - alt. 1,168 ft - Path to the rock shelters
  4. 3 : mi 2.41 - alt. 1,073 ft - Towards the top of the hill
  5. 4 : mi 3.89 - alt. 1,319 ft - Dirt track on the right
  6. 5 : mi 5.09 - alt. 705 ft - Main track
  7. 6 : mi 5.36 - alt. 659 ft - Path on the right
  8. 7 : mi 5.57 - alt. 620 ft - Roman bridge
  9. S/E : mi 6.12 - alt. 594 ft - Car park on a dirt esplanade

Notes

The only water source on the route is the Font de Mars. However, it is often swarmed with wasps.
Good walking boots are essential, as the paths are often very rocky.
Walking poles are recommended.
The only shelter is provided by the Baumes de la Roche Redonne. In the event of a thunderstorm, they might come in handy… provided you happen to be there at the right time!
And in any case, this walk is strongly discouraged if there is a risk of rain.

This walk shares part of its route with another walk published on Visorando by Perrye83: Sainte-Anne du Castellet – La Redonne – Les Fours. Both walks feature unique sections and have different points of interest.

Worth a visit

Definitely worth seeing, of course, are the kilns (for cade, pitch and lime); for a description of these, please refer to Perrye83’s walk.
The paved slanting street, after descending from the pitch and lime kilns.
The numerous fossils, mainly rudists, which are abundant at La Roche Redonne.
The fossilised burrows of Cretaceous lugworms.
The Roman bridge (Pont du Cannet).
The unauthorised rubbish tip on the Capucine estate.

(1) In the limestone forming the path you take after descending from the kilns and the surrounding rocks, it is common to find fossils, particularly rudists. Also worth noting in this area is the ‘paved slanting street’, a cobbled path made of limestone slabs, the quality of whose laying has enabled it to stand the test of time. This path was a route linking Toulon and Marseille and was used, amongst other things, to transport goods from the kilns.

Please be aware that the path between the kilns and La Roche Redonne is often narrow and offers little room to get out of the way should a mountain biker or, worse still, a motorcyclist come along: so be very cautious (as mountain bikers and motorcyclists rarely are).

(2) The caves at La Roche Redonne are impressive for their size and their overhanging forms, and it is well worth taking your time to examine them. Some of them have been fitted out with dry-stone walls.

(3) On the Roche Redonne slope, 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! We shall therefore content ourselves with observing and photographing them.

From the ridge we follow after the Penon campsite, we’ll have a superb view of La Cadière, Saint-Cyr and La Ciotat at all times, and, closer by, the Faloubert valley.

It is also on this stretch that we shall come across traces of our famous Cretaceous lugworms: on the surface of the limestone-sandstone slabs that make up the path, we can see sort of sausage-shaped tracks 2 to 4 cm thick, sometimes forming a network, which might be mistaken for fossilised roots, but are in fact the fossilised burrows of lugworms that lived on the seabed around 80 million years ago. These traces (which form part of what are known as ichnofossils – fossilised traces of the activity of living organisms) are particularly abundant here.

Unfortunately, one can also see, in the valley ahead of us, on the outskirts of the Domaine de la Capucine, a hideous tip containing various materials, including construction and agricultural waste. This hideous tip disfigures the landscape and endangers the Roman bridge, not to mention the depreciation of the nearby agricultural land (this is, after all, a Bandol appellation region!): reporting this to the Tourist Office or the local council can only be helpful; I have already done so and am certainly not the only one. One can always hope that the authorities will take notice…

(6) The Roman bridge, or Pont du Cannet, is very well preserved but is under threat, on the verge of being submerged by the rubbish tip which is encroaching on the area.

Reviews and comments

4.6 / 5
Based on 15 reviews

Reliability of the description
4.5 / 5
Ease of following the route
4.5 / 5
Route interest
4.8 / 5
DENISFRAN
DENISFRAN

Overall rating : 5 / 5

Date of your route : Feb 17, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

We started from St Anne's Chapel, where there is more parking space. Then, climbing up alongside the cemetery, we took a path heading west which led to the starting point of the hike. A beautiful route with many points of interest. The climb to La Roche Redonne is steep and challenging, but the cave and rock shelters are well worth the detour. On the sea side, you can walk on Cretaceous mud worms and the view is magnificent. Thank you for this route.

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vincent_viot
vincent_viot

Overall rating : 5 / 5

Date of your route : Feb 03, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

An exciting hike with lots to see and magnificent scenery with superb views.

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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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