4.2
(246)
2,030
hikers
40
hikes
Hiking around Ustou offers diverse natural landscapes within the Pyrénées Ariégeoises Regional Natural Park. The region is characterized by impressive glacial cirques like the Cirque de Cagateille and Cirque d'Anglade, alongside prominent mountain peaks and scenic passes. Hikers can explore the Alet valley, dense forests, and discover numerous waterfalls, such as the Ars Waterfalls, and mountain lakes. This varied terrain provides a range of hiking experiences from valley walks to challenging mountain ascents.
Last updated: May 12, 2026
4.7
(25)
153
hikers
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4.9
(17)
161
hikers
3.63km
01:28
160m
160m
Moderate hike. Great for any fitness level. Mostly accessible paths. Sure-footedness required.

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4.1
(10)
118
hikers
7.84km
04:29
740m
740m
Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
4.3
(3)
66
hikers
29.2km
11:19
1,500m
1,510m
Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.
5.0
(1)
34
hikers
Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.
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Popular around Ustou
Superb hike starting from Aulus-les-Bains. Ars waterfall plus Guzet lake
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Good way to the waterfall. accessible for young and old. One of the highest waterfalls in the Pyrenees.
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This magnificent cirque of glacial origin spectacularly closes the superb Ustou valley. This natural site deserves as much to go to its feet to admire the whole as to climb to its heights to enjoy the panorama.
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This small glacier is wonderfully nestled in the heart of the Cagateille cirque. It is surrounded by snow-capped peaks. It is a great hiking objective but also a place to take a break during a longer walking stage.
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Very nice hike. In the shade all along the trail. Perfect for a hike in the heat.
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The waterfall consists of a first 100-meter drop that forms a pool at its foot, and continues with multiple cascades that come together to form a final drop. Overall, it is therefore divided into three levels, for a drop of 246 meters. It is undeniably one of the most picturesque and imposing in the Pyrenees.
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Here is a beautiful specimen of the type of renovated stone huts found along the Pyrenean trails.
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Ustou, nestled within the Pyrénées Ariégeoises Regional Natural Park, offers a diverse range of terrain. You'll encounter impressive glacial cirques like the Cirque de Cagateille and Cirque d'Anglade, alongside prominent mountain peaks and scenic passes. The Alet valley features lush forests and river-based paths, while higher elevations lead to waterfalls and mountain lakes. Expect everything from gentle valley walks to challenging multi-hour ascents with significant elevation changes.
Yes, Ustou offers a variety of trails suitable for different skill levels. For an easier experience, consider routes like the Cirque de Cagateille – Forest path loop from La Peyre. This moderate 2.3-mile (3.6 km) path provides an accessible forest experience around the Cirque de Cagateille, ideal for families or those seeking a less strenuous walk.
For experienced hikers seeking a challenge, Ustou has several demanding routes. The Cirque de Cagateille – loop via the étang de la Hillette and the étang d'Alet is a difficult 7.3-mile (11.7 km) trail that takes over 6 hours to complete, offering views of glacial lakes. Another challenging option is the View of the Cascade d'Ars – Ars Waterfall (Middle) loop from Guzet-Neige Prat Mataou, a long 18-mile (29 km) route with significant elevation gain.
Absolutely. Ustou is known for its beautiful waterfalls. The most prominent are the Ars Waterfalls, which can be reached via several trails. For example, the Trail to the Ars Waterfalls – View of Aulus-les-Bains loop from Pic de Crespies is a difficult 13.3-mile (21.4 km) route that leads to these impressive cascades.
Yes, the Ustou region boasts numerous picturesque mountain lakes. The Cirque de Cagateille – loop via the étang de la Hillette and the étang d'Alet offers views of glacial lakes within the regional park. Other notable lakes in the wider area include Estats Pond and Estany de Romedo de Dalt, which are significant natural features in the Pyrenees.
Yes, Ustou offers options for families. While some routes are challenging, there are easier paths suitable for children and less experienced hikers. Look for shorter, less steep loops, particularly those in forested areas or along the valley floor, which provide a pleasant outdoor experience without excessive difficulty. The Cirque de Cagateille – Forest path loop from La Peyre is a good example of a moderate, shorter option.
Many trails in the Pyrénées Ariégeoises Regional Natural Park, including those around Ustou, are generally dog-friendly, especially if dogs are kept on a leash. However, it's always advisable to check specific trail regulations, particularly in protected areas or near grazing livestock. Ensure your dog is well-behaved and that you carry waste bags to maintain the natural environment.
Yes, circular routes are a popular way to explore Ustou's landscapes. Many trails are designed as loops, allowing you to start and end at the same point. Examples include the Cirque de Cagateille – loop via the étang de la Hillette and the étang d'Alet and the Cirque de Cagateille – View of the Ustou Valley loop from La Peyre, both offering varied scenery on a return path.
The best time for hiking in Ustou is typically from late spring to early autumn (May to October). During these months, the weather is generally milder, trails are clear of snow at lower to mid-altitudes, and the flora is vibrant. Summer offers the warmest temperatures, while spring and autumn provide beautiful colors and fewer crowds. Higher mountain routes may still have snow well into early summer.
Yes, parking is generally available at or near popular trailheads in Ustou and the surrounding areas. As part of the Pyrénées Ariégeoises Regional Natural Park, efforts are made to provide access for visitors. However, during peak season, spaces can fill up quickly, especially for well-known routes like those leading to the Cirque de Cagateille or Ars Waterfalls. Arriving early is recommended.
The komoot community highly rates hiking in Ustou, with an average score of 4.3 stars from over 250 reviews. Hikers often praise the dramatic glacial cirques, the stunning Ars Waterfalls, and the serene mountain lakes. The diverse landscapes, from lush valley forests to high mountain passes like Agnès Pass and Lers Pass, are frequently highlighted as key attractions.
Ustou is rich in natural monuments and offers spectacular viewpoints. Beyond the impressive glacial cirques, you can find prominent peaks like Pica d'Estats and Montcalm Peak, which provide breathtaking panoramic views. The region also features scenic mountain passes such as Col d'Agnes and Port de Lers, known for their beauty and vistas.


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