Trou de l'Argent cave - Montagne de la Baume

This hike takes you to the top of La Baume. Magnificent views of Sisteron, the surrounding valleys and the Alps. You then cross to the other side of the mountain, revealing yet another landscape. But first, you will need to pass through the Grotte du Trou de l'Argent, which adds a touch of adventure to the route. During your journey, you will also use handrails, small ladders and cross a balcony.

Details

822875
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  • Walking
    Activity: Walking
  • ↔
    Distance: 8.52 km
  • ◔
    Average duration: 4h 20 
  • ▲
    Difficulty: Difficult

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 666 m
  • ↘
    Descent: - 667 m

  • ▲
    Highest point: 1,139 m
  • ▼
    Lowest point: 475 m

Photos

Description of the walk

Park at the Porte de Provence (small car park after the bridge on the right coming from Sisteron). On this route, always follow the yellow markings.

(S/E) Reach the start of the climbing routes, which you will follow on your right, along a fence that follows the curves of the walls, to begin the hike in the undergrowth, which is very pleasant when the weather is nice. Gradually gain altitude, discovering a beautiful view of Sisteron and its citadel.

(1) Turn left. Cross beautiful stretches of grass in September/October.

(2) Beautiful view of the citadel. The path continues gently with little elevation gain.

(3) Take a steeper path on the left that leads you towards the walls of La Baume. This section has little shade and can be a little difficult in direct sunlight.

(4) Enjoy the cooler air and continue on the left. The slope becomes steeper again as you approach the walls, sometimes requiring you to get down on all fours.

(5) You will finally arrive at the wall. Two holes are visible: these are small caves, but they are not the ones you are looking for! You will need to continue to the right until you reach a ladder and a handrail that allow you to climb up to the first cave. It is relatively bright. You will come out onto a small balcony with a beautiful view.

However, continue on your way to the second cave, but not before noticing an inscription on a stone on the ground. The second cave is much darker. A torch is essential for finding your way around. You may have to leave your rucksack behind, as I did, in order to get through on all fours and then get out again.

You will arrive at a beautiful open space, again like a balcony, and continue on your way, noticing another inscription, this time vertical.

(6) A little further on, use another handrail, which then becomes more vertical, but is still well equipped with a handrail. When you reach the top, walk along the ridge to the right until you reach a panoramic view.

(7) Retrace your steps and, at the top of the last handrail, continue west. The path then turns right and heads northwest. The rest of the hike is easy.

(8) You will arrive at a road, which is not very pleasant, and follow it to the left before taking a fairly wide path on the left, in a hairpin bend to the right of the road. This path will then narrow as it turns west to join Sisteron. Descend, following the yellow markings, to the car park below (S/E).

Waypoints

  1. S/E : km 0 - alt. 476 m - Parking at the foot of the climbing routes. - La Durance
  2. 1 : km 1.53 - alt. 755 m - To the left
  3. 2 : km 1.99 - alt. 788 m - View of Sisteron
  4. 3 : km 2.4 - alt. 772 m - Path on the left
  5. 4 : km 2.8 - alt. 875 m - To the left
  6. 5 : km 3.38 - alt. 1,019 m - Start of the 4-leg section
  7. 6 : km 3.59 - alt. 1,081 m - Handrail
  8. 7 : km 3.78 - alt. 1,138 m - Panoramic view
  9. 8 : km 5.27 - alt. 817 m - Road on the left
  10. S/E : km 8.52 - alt. 475 m - Parking at the foot of the climbing routes.

Notes

No water sources, significant elevation gain. Bring plenty of water.
Good hiking equipment, not just trainers.
Head torch/lamp essential.
Do not hike on windy days as some sections are very exposed with drops nearby. Not recommended for people who are afraid of heights or climbing vertically.
Follow the direction of the hike: going in the opposite direction can be dangerous!!!

Worth a visit

Citadel of Sisteron.

Reviews and comments

4.8 / 5
Based on 63 reviews

Reliability of the description
4.9 / 5
Ease of following the route
4.7 / 5
Route interest
4.9 / 5
User 4405476

Overall rating : 5 / 5

Date of your route : Nov 27, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magical hike with such varied views... Bring a torch and not recommended for those who suffer from vertigo or feel uncomfortable in confined spaces... Even the north-facing side has its charm on the way down...

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User 27390299

Overall rating : 5 / 5

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

Hike completed on 8/11/2025
The climb is fairly steady through the woods, then a little steeper as you approach the cliff. No difficulty in the caves or with the chains. Superb view at the top and a slightly slippery descent due to autumn leaves on the wet trail. Otherwise, many thanks to preonkonrat for this route. A hike worth doing, fun and a little challenging.

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User 2620088

Overall rating : 5 / 5

Date of your route : Oct 20, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike with the added bonus of the Trou d'Argent and steep passages that give it its charm. Not recommended for those who are afraid of heights and would refuse to tackle the obstacle. After that, it's not so complicated as long as you stay calm and focused, with a firm grip and good footing. The return trip via the north-facing slope is in the shade, and apart from the coolness in summer, I didn't find it offered much except for taking a detour and not retracing your steps! (The views are less clear because you're in the undergrowth.)
Having done it in autumn and knowing this, I would have preferred to retrace my steps, staying in the sun and facing the scenery! But turning back from point 7 is more dangerous than going there because you're going downhill without always being able to see the steps of the ladders, which you have to find by looking down into the void... (so if the way there was tricky, it's better to finish on the north-facing slope).

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suzie0405
suzie0405

Overall rating : 5 / 5

Date of your route : Oct 16, 2025
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

Very nice route, a bit of climbing, lovely views of the cave, and also from the top of La Baume, a breathtaking view of Mourre de Gache, where we went the next day.

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Lorian
Lorian

Overall rating : 5 / 5

Date of your route : Jun 08, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Incredible hikes, the passage through the cave is amazing, and the view at the highest point of the hike is magnificent.

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Gildeboissy
Gildeboissy

Overall rating : 4.7 / 5

Date of your route : Jun 12, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very beautiful hike, but also very physically demanding. The trail leading up to the caves is really steep and quite long, so it requires sustained effort. The technical section is truly impressive. It should not be taken lightly because the slightest misstep can be very dangerous (you are walking along walls 4 to 5 metres high) secured by steel cables and metal steps, but if you make a mistake, the fall could be serious. As for the caves, the first one is fairly simple and short, but the second one requires caution. A headlamp is essential because it is really dark and you need it to find the exit at the back on the right. The exit is narrow and ends in a passage that you have to crawl through on all fours. Between the two caves, you'll find a wonderful surprise. I won't say any more, I don't want to spoil it for you Otherwise, the panoramic views are magnificent. Sisteron, its village and its beautiful citadel are revealed in all their splendour. At the top, you can see griffon vultures circling above your head, well aware of your presence. What magnificent birds! The end of the hike is less interesting. You descend through a forest and finish on a forest path that is half in the sun and half in the shade.
Thank you to the author for this beautiful hike.

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Franck D
Franck D
• Edited:

Overall rating : 5 / 5

Date of your route : Apr 06, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : Yes

Great fun (and a good source of stress )
Too bad we missed the inscriptions Xavier Dechaux engraved on the stones.

Suggested variant to avoid the road and tarmac on the way back:
From point 8 (Col de Mézien): stay off the tarmac and take the little path that goes off to the left just before the hairpin, which stays in the forest.
+
A little before you reach the village there is a Y junction with mountain bike signs: follow them to the left to reach the wash-house in the village.

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La Méridienne Venterol
La Méridienne Venterol

Overall rating : 5 / 5

Date of your route : Mar 25, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A very pleasant hike, but one that does require a bit of training and there are some tricky sections with aids (ropes, metal steps, etc.). Passing through a cave with headlamps is great fun.

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myco
myco

Overall rating : 4.7 / 5

Date of your route : Feb 17, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

Magnificent hike, difficult, aerial, bordering on climbing at times

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Bessillon
Bessillon

Overall rating : 5 / 5

Date of your route : Feb 02, 2025
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Very nice route

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Moman
Moman

Overall rating : 4.7 / 5

Date of your route : Nov 06, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

A very nice walk with beautiful views and a playful passage through the cave, bring a torch and be flexible enough to bend down low enough for the passage; don't be afraid of heights afterwards to reach the top of the route; wall equipped with handrail and ladder. When you reach the top, turn right as indicated. Note that both left and right paths are marked with a yellow cross! Strange, isn't it? So ignore it and go and look at the viewpoint on the right and retrace our steps to go back down through the forest and the ubac de la Baume.

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le dd
le dd

Overall rating : 5 / 5

Date of your route : Nov 03, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A magnificent hike with technical sections that require you to be on your toes during the very aerial, but safe, sections.
The Balcony at the end of the caves can be impressive and requires the utmost caution, as the terrain is unstable and there are no handrails.
The best thing about this route is the panoramic views and the fun of the passages through the "Trou d'Argent".
Don't forget your headlamp, very useful at the beginning of the cave.
Thanks to the author

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Sharkquebec
Sharkquebec

Overall rating : 4.3 / 5

Date of your route : Jun 23, 1970
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : Yes

A nice hike with a fair amount of climbing, but doable.
Don't be afraid of heights, some tricky sections.
I'm in average physical condition. The descent in the autumn was no picnic, it wasn't slippery.
Some great encounters: wolves seen in the distance, 2 goats at the cave (you wonder how they got there?).
I recommend it for people looking for a change of scenery and their limits.

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MattC13
MattC13

Overall rating : 5 / 5

Date of your route : Sep 15, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

Great walk, with some steep climbs just before reaching the foot of the cliffs.
Fun passages through the caves and balconies (with a welcome from 2 goats at the exit!) and via the ladders.
Sublime views from the ridge.

The weather was fine for us - in fact, you should avoid rainy and windy days.

A must!

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Fontenotte
Fontenotte

Overall rating : 5 / 5

Date of your route : May 30, 2024
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good
Very busy route : No

A superb hike, demanding (especially for a 78-year-old senior citizen!) but well worth it.

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