Around the Ruisseau de Lagarel from Saint-Guiraud

Date of your route : Dec 17, 2025
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★★ Very good
Route interest : ★★★★☆ Good
Very busy route : No

The tunnel is easy to find, but vegetation is encroaching. The only drawback is the length of the road, which is
dangerous and not much fun. Avoid doing it after heavy rain. There are three fords to cross before you get back on the track. It's fun, but it was touch and go keeping our feet dry!
So yes, there are no markings, but with the IGN map and Koomot, it's a piece of cake.

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Date of your route : Dec 02, 2025
Reliability of the description : ★☆☆☆☆ Very disappointing
Ease of following the route : ★☆☆☆☆ Very disappointing
Route interest : ★★★★☆ Good
Very busy route : No

Hello
The route is interesting but "ruined" by a generally inappropriate description from the outset. Yes, you have to take Rue du Chateau d'Eau, which is further on, opposite a track. In fact, at the end of this street, there is a kind of round concrete basin about 2 metres high, which must be the small water tower. From there, you need to take the path on the right-hand side of the basin (almost a continuation of Rue du Château) and then, at the end, turn left and go up the hill after a barrier. From this barrier, it's about 80 metres to the first path on the left. Go straight ahead at the end (30 metres) and, behind the foliage, you'll come to the famous tunnel.
We missed this path leading to the tunnel and went straight on to a large ridge, then turned back at some point because we were getting further away from St Guiraud...! With no signs or markings, we ended up on the D144 and reached point 2, the tunnel, then point 1 (returning in the opposite direction...).
We ended up walking about 4 km further, but the region is beautiful and the hike is not difficult.
We will do it again later, in the right direction this time. We hope that all the directions on the app will be clear because the markings and landmarks we expected to find on the ground were non-existent.

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Date of your route : Nov 17, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★☆ Good
Very busy route : No

The description of the route to find the tunnel is insufficient, but this helps to protect the site.

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Date of your route : Mar 17, 2025
Reliability of the description : ★★★☆☆ Average
Ease of following the route : ★★★☆☆ Average
Route interest : ★★★★★ Very good
Very busy route : No

We missed the tunnel and had to make two return trips.
On the other hand, we did get to enjoy some lovely views across the plateau towards the Pyrenees.
The section through the scree is very tricky and requires considerable perseverance.
Lack of signposting or cairns.
The route itself is pleasant, apart from the kilometre on the road!

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

I only followed the directions partially so that I could extend the route. At the start, the description lacks precision; it would be helpful to specify, after Rue du Château d’Eau, that at the Château d’Eau you should turn right onto the hairpin bend track that climbs up opposite. After 150 metres, indicate that the track to take on the left descends and is stony. Once you can see the lime kiln, carry straight on, ignoring the path that branches off to the left and descends very steeply towards the kiln (unless you want to visit it, which we did and it’s well worth it). From point 4, we turned left towards Le Causal; you need to reach the high-voltage power line and follow it, then turn right to join the track leading to the Isserts dolmen, where there is also a superb drystone shelter. After that, we headed back towards the Canyon du Diable, which we explored without following the official trail markers (in particular, we walked upstream along the Agaras, which ends in a superb waterfall); we then rejoined the marked route from point 7, and the rest of the route is clear and well-marked.

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