The Bourbouillet Trail

Les Gras, the limestone plateaus of southern Ardèche, may seem monotonous at first glance. This route allows you to discover varied vegetation and sometimes surprising terrain. Walking here in spring, with the green of the woods, or in autumn, with the beautiful colours, may be preferable to summer, with its high temperatures; however, part of the route is shaded. The hike passes near a karstic cave (caution!) where the underground river of the Bourbouillet resurgence flows.

Details

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  • Walking
    Activity: Walking
  • ↔
    Distance: 9.22 mi
  • ◔
    Average duration: 4h 35 
  • ▲
    Difficulty: Moderate

  • ⚐
    Back to start: Yes
  • ↗
    Ascent: + 413 ft
  • ↘
    Descent: - 404 ft

  • ▲
    Highest point: 892 ft
  • ▼
    Lowest point: 525 ft

Photos

Description of the walk

Park in the car park at the Lablachère swimming pool.

(S/E) Join the road north of the car park and follow it for 100 metres. Turn right onto Chemin de Bourbouillet.

(1) Keep right at the next crossroads (yellow/white markings). After a few hundred metres, a path joins at a three-way junction on the left.

(2) Follow the continuation of this path, which heads south-east. Pass under a power line and keep right at the following crossroads (markings). You will arrive at a series of ponds linked to the presence of clay, called Font (fountain) Merdouse.

(3) Gradually enter the woods, where the karstic landscape appears, sometimes surprising. You will arrive at a clearly marked T-junction.

(4) Take the path on the right (marked). There is a yellow/white cross on the path on the left, which is not shown on the IGN map and is described in another hike: "A short walk on the Gras de Perret". The path quickly dips to the right, entering a landscape of rocks and slabs, often submerged in Tolkien-esque woods. Pay close attention to the markings and the trail, especially in areas with rocks and slabs. You will reach the "Réméjadou" hiking sign.

(5) Turn left towards "Bourbouillet". The trail passes through woods and between rocks. Between two large rocks on the left, the sound of deep water can be heard from the trail. After these large rocks, the trail changes from a south-easterly to a north-easterly direction and a small path leads almost back to the left. Caution: the Réméjadou karstic cave is about 30 metres deep. Caving equipment is required to access it. Approach very carefully (there is no protection, fatal fall in July 2023) and listen to the sound of water flowing at the bottom. Find the path that gradually emerges from the forest into a cow pasture. You will come to a wide path bordered by a high fence.

(6) Follow this path for about fifty metres southwards, then look to the right (be careful of the electric fence) for tracks leading downhill to access the Bourbouillet Resurgence.

(7) Retrace your steps to the previous crossroads.

(6) Take the path opposite (north-northeast) that runs along the fence on your left until you reach the "Espeluche" hiking sign.

(8) Turn right (towards Joyeuse). At the top of the hill, leave the fence and turn left.

(9) At the fork towards Saint-Alban-Auriolles, continue straight ahead towards Joyeuse. Keep right at the junction with a path coming from the left. You will come to a crossroads with a wide path suitable for vehicles, signposted "Falaises de Lunel".

(10) Take this path on the left (Route des Grads) overlooking the Beaume. Walk to the houses (water reservoir just before on the left). Follow the markings, leave the Route des Grads by turning left and arrive at Guilhaumon.

(11) Leave the road and take the path on the right to reach Lauzette, passing under a power line.

(12) At Lauzette, keep left, then right at the next crossroads. At Bouchard, you will arrive above a ravine.

(13) In a bend in the road to the right and north-west, a path leads south and joins the starting point.

(1) Turn in the opposite direction to complete the circular loop (S/E).

Waypoints

  1. S/E : mi 0 - alt. 879 ft - Lablachère swimming pool
  2. 1 : mi 0.3 - alt. 883 ft - Crossroads of the circular loop
  3. 2 : mi 0.67 - alt. 856 ft - Combe d'Amady
  4. 3 : mi 1.16 - alt. 823 ft - Font Merdouse
  5. 4 : mi 2.49 - alt. 669 ft - Les Combes
  6. 5 : mi 3.12 - alt. 666 ft - "Réméjadou" hiking sign
  7. 6 : mi 3.86 - alt. 584 ft - Bourbouillet
  8. 7 : mi 3.95 - alt. 528 ft - Bourbouillet resurgence
  9. 8 : mi 4.23 - alt. 591 ft - "Espeluche" sign
  10. 9 : mi 4.72 - alt. 673 ft - Fork towards Saint Alban Auriolles
  11. 10 : mi 5.59 - alt. 778 ft - Lunel Cliffs. Valley of the - Beaume (rivière)
  12. 11 : mi 7.01 - alt. 801 ft - Guilhaumon
  13. 12 : mi 7.74 - alt. 853 ft - Lauzette
  14. 13 : mi 8.68 - alt. 863 ft - Bouchard
  15. S/E : mi 9.22 - alt. 879 ft - Lablachère swimming pool

Notes

Bring enough water in hot weather.

The paths are good, but the ground is sometimes clayey, the limestone slabs slippery, and there are a few stony sections: good footwear is always preferable.

''Alternative: at (8), you may prefer a shorter, less difficult and more bucolic unmarked path. Take the well-marked path that heads almost due north. It is unlikely that you will get lost, as you will rejoin the marked path after a little over 800 metres.''

Worth a visit

Reviews and comments

4.6 / 5
Based on 9 reviews

Reliability of the description
4.9 / 5
Ease of following the route
4.4 / 5
Route interest
4.3 / 5
M Grisel
M Grisel

Overall rating : 4.3 / 5

Date of your route : May 04, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good
Very busy route : No

A varied route across the region’s typical plateau, starting from the Lablachère swimming pool, lined with flowering thyme at this time of year before heading into the forest. There are a few sections with large boulders to negotiate, but the path is well marked. There’s a bit of uncertainty in the rocky terrain leading to a karstic cave; you need to look around a bit to find your way. As I was on my own, I didn’t want to go looking for the karstic cave (which, according to the description, is unprotected). A lovely hike.

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User 16424207

Overall rating : 4.7 / 5

Date of your route : Mar 16, 2026
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

A fairly easy walk with beautiful scenery, a lovely wood with magnificent rocks, moss and lush vegetation.
The only downside is the last few kilometres on tarmac.

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mail380
mail380

Overall rating : 3.7 / 5

Date of your route : Feb 23, 2026
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★☆☆ Average
Very busy route : No

A pleasant short walk

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User 24320165

Overall rating : 5 / 5

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

Great hike! It exceeded my expectations. I was blown away by the karstic cave and loved how the scenery changed. The route was very easy to follow. However, make sure you bring enough water, especially when it's hot. For people who don't like walking on tarmac, this hike is ideal: there isn't much of it.

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jocelyne.sp
jocelyne.sp

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 : No

Beautiful hike
We did this hike after the previous day's rain, and the trail was impassable in places, forcing us
to make a few detours through the undergrowth and rocks (nothing too bad).

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IgOr07
IgOr07

Overall rating : 4.7 / 5

Date of your route : Mar 12, 2023
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No

Hello, very nice hike except that we couldn't find the Bourbouillet resurgence as the information wasn't very clear. If possible, a sign should be put up at the place where you have to go to find it. At No. 6, we went down the path and the water was flowing underneath us, but we didn't find anything else. However, don't do this hike in hot weather as there is very little shade.

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MATHIEU BERNARD
MATHIEU BERNARD

Overall rating : 4.7 / 5

Date of your route : Feb 20, 2022
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : Yes

Very nice hike but a bit laborious towards the end. If I do it again, after point 11, at the next fork, I will go straight on towards Les Blaches (point 251) to rejoin the route between points 2 and 3 further on, in order to avoid the monotonous stretch of road between 12 and 13. That's the only slight downside. I would also try the alternative route indicated at point 8, which looks very nice. Of course, this will shorten the circular loop . Worth noting is the picnic spot at the Bourbouillet resurgence (point 7). Thanks to the route planner.

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boninmi
boninmi

Hello ghenou and m30,

Thank you for your feedback. This classic hike deserved a description on Visorando, which is why I decided to write one. It is undoubtedly one of my favourite hikes, if not my absolute favourite.

I've done it many times in groups of 15 to 20 people with the Randonneurs Indépendants de la Fontaulière (see also the Fontasse and pb07 pages).

Best regards,

M. Bonin

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m30
m30

Overall rating : 5 / 5

Date of your route : Apr 27, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★★ Very good

Very beautiful hike, but beware of the heat in summer.

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ghenou
ghenou

Overall rating : 4.3 / 5

Date of your route : Mar 21, 2019
Reliability of the description : ★★★★★ Very good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★☆ Good

A very beautiful hike, pleasant and very well marked, as always in Ardèche (thanks to the trail markers).
Perhaps best avoided in very hot weather.

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