Best lakes around Ustou are nestled within the Ariège Pyrenees, a region known for its mountainous terrain. This area features numerous picturesque lakes, many of which are situated at high altitudes. These natural bodies of water offer tranquil settings and serve as destinations for hiking and various outdoor activities. The landscape around Ustou provides diverse opportunities for exploration.
Last updated: October 15, 2026
Highlight • Mountain Hut
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Charming refuge in a magical place, especially at sunrise when the light enters the valley.
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We walked it today with 38C. But this is really a tough tour. Especially the last part is really climbing and scrambling.
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Fantastic scenary, but the walk is more a difficulty 2 rather than 1.
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A large mountain lake near the Refugi de Certascan hut. Today it looks like an estuary in Norway.
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Conveniently located hut for those who want to take the technically easiest, but with 2,000 meters of elevation gain, longest climb from the parking lot at L'Artigue to the peaks of Pic du Montcalm, Pica d'Estats, and Pic de Sotllo. The hut was already closed when I climbed in mid-October, but a winter room with approximately 14 beds was open. There's a cash register at the entrance, charging €8 per night.
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"The house by the lake..." Beautifully situated hut on the ascent path from the L'Artigue parking lot to several peaks, including Pic du Montcalm and Pica d'Estats (I also included the somewhat more difficult Pic de Sotllo, hence my photos here as a "highlight" of mountain hiking). The hut was already out of service in October 2024, but there was a winter room with approximately 14 beds. A cash register awaits a deposit of €8 per night.
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One of the most beautiful lakes in the Pyrenees, it is difficult to get to, but it is worth it.
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The Certascán lake is the largest glacial lake in the Catalan Pyrenees and rivals the Tort lake for being the largest in the whole mountain range. The final section of the climb is quite comfortable because it is well trodden by all the mountaineers who climb to the magnificent Pyrenean lake. At the entrance to the glacial cirque there is a small lagoon surrounded by cliffs and rocky outcrops and then there is the Certascan Refuge, practically on the shore of the lake. The path continues along the Coll de Certascan towards other places and mountain valleys at the foot of beautiful peaks, such as the Certascan peak (2,853 m), an interesting option for lovers of peaks. The return is along the same path until the detour of the path that descends from the Llurri gap. At this crossroads, continue straight ahead, going slightly uphill, and leave a path that goes down to the right towards the Canalada dam and the forest track that goes up from Montalto. The trail jumps over a small shoulder on the slope of the mountain range and begins a long descent towards the Vall de Cardós. The path is marked with the white and red signs of the long-distance path that connects the GR-11 of the Senda Pirenaica with the French paths GR-10 and Alta Ruta Pirenaica or Haute Randonée Pyrénéenne (HRP).
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Many lakes around Ustou are popular hiking destinations. For a pleasant, shaded walk, consider the trail to Guzet Pond, which is particularly recommended for warmer weather. For more challenging routes, the area around Pinet Refuge provides access to various peaks of the Montcalm massif. You can find detailed hiking routes in the Hiking around Ustou guide.
Yes, Guzet Pond is considered family-friendly, offering an idyllic setting bordered by vegetation. Its hiking route is largely shaded, making it comfortable for families, especially during warmer months. Remember to pack a picnic and enjoy the serene environment.
Visiting in spring is highly recommended, as you can witness the impressive Ars waterfall as part of a longer hiking loop that includes Guzet Pond. Summer offers pleasant conditions for high-altitude hikes, while autumn brings beautiful colors to the landscape. Be prepared for potentially windy conditions and pack appropriate clothing, even in summer.
Yes, the Pinet Refuge, located at an altitude of 2,240 meters, offers overnight stays and even features a winter room for hikers. This refuge is a key access point for exploring the Montcalm massif and nearby lakes like Estats Pond.
The lakes around Ustou are nestled in a stunning natural landscape, primarily known for their high-mountain glacial formations. You'll encounter picturesque lakes with crystal clear waters, lush vegetation, and panoramic views of the Ariège mountain range. Areas like Estany de Romedo de Dalt are excellent examples of these beautiful glacial basins.
Yes, the high-altitude lakes and refuges like Pinet Refuge provide excellent opportunities for multi-day hikes. The refuge offers overnight stays, allowing hikers to explore various peaks of the Montcalm massif and other nearby lakes over several days. The area around Estany de Romedo de Dalt is also part of longer routes, offering a sense of solitude for extended treks.
Many lakes, especially those at higher altitudes, require hiking to reach. While specific parking details for each trailhead are best researched locally, trails often start from designated parking areas. For instance, the ascent to Labant Pond can be accessed from the Coumebière Plateau, which typically has parking facilities.
Absolutely. Estany de Romedo de Dalt is particularly appreciated for its solitude and splendid scenery. Hikers often report encountering very few people, making the experience extra special and peaceful. Estats Pond, nestled in a beautiful rocky valley near Pinet Refuge, also offers a peaceful break.
For hikes to the lakes, especially in spring, it's essential to pack layers of clothing suitable for varying weather conditions, as it can be windy. Bring enough water and snacks, as well as appropriate hiking footwear. If visiting in spring, consider waterproof gear due to potential snowmelt and the Ars waterfall. Don't forget sun protection and a camera for the magnificent panoramas.
Beyond hiking, the region around Ustou offers various outdoor activities. You can explore road cycling routes like the 'Col de la Core Loop from Seix' or 'Agnès Pass – Lers Pass loop from Aulus-les-Bains'. For touring cyclists, there are routes such as 'Along the Salat by Seix'. Find more details in the Road Cycling Routes around Ustou and Cycling around Ustou guides.
While the high-altitude lakes offer clear, often cold water, specific regulations for wild swimming can vary. Many lakes, such as the sizable Étang d'Arbu (not a Komoot highlight but mentioned in regional research), have clear water even during dry summers and offer spots to relax by the water's edge. Always check local guidelines and safety information before attempting to swim in natural bodies of water.
The high-altitude lakes around Ustou are unique for their pristine natural beauty, tranquil settings, and their formation within glacial basins. They often feature crystal clear waters, dramatic rocky valleys, and provide access to challenging mountain peaks. The sense of solitude and the untouched landscapes, as seen at Estany de Romedo de Dalt, contribute to their special appeal.


Still not found your perfect lake around Ustou? Check out the guides of these regions to see even more beautiful places.