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France
Occitania
Saint-Gaudens

The best walks and hikes around Oô

4.5

(1771)

20,272

hikers

18

hikes

Hiking around Oô, nestled in the French Pyrenees, offers access to a landscape characterized by majestic mountains, glacial lakes, and significant waterfalls. The region's terrain includes alpine forests, rocky cliffs, and high-altitude environments, with elevations reaching above 3,000 meters. The area is centered around the iconic Lac d'Oô, known for its 275-meter waterfall, and provides a network of trails through varied mountain scenery.

Best hiking trails in Oô

  • The most popular hiking route is From Astau Barns to Saussat Lake via Oô Lake and Espingo Lake, a difficult 8.3 miles (13.4 km) trail that takes 6 hours to complete. This route connects multiple glacial lakes, including Lac d'Oô and Lac d'Espingo.
  • Another top favourite among local hikers is Route 11: Pic du Perdiguère – 15 peaks over 3,000 metres in the Pyrenees, a difficult 17.6 miles (28.3 km) path. This challenging route explores high-altitude terrain, including the Pic du Perdiguère massif.
  • Local hikers also love the View of the plain – Lac d'Oô loop from Granges d'Astau, a 9.3 miles (14.9 km) trail leading through mountain scenery around Lac d'Oô, often completed in about 7 hours 30 minutes.
  • Hiking around Oô is defined by glacial lakes, dramatic Pyrenean peaks, and impressive waterfalls. The network offers options for various ability levels, from moderate paths to challenging high-mountain ascents.
  • The routes in Oô are highly rated by the komoot community with an average score of 4.5 stars from over 1,700 reviews. More than 20,000 hikers have used komoot to explore Oô's varied terrain.

Last updated: May 12, 2026

4.7

(134)

1,772

hikers

#1.

From Astau Barns to Saussat Lake via Oô Lake and Espingo Lake

13.4km

06:00

930m

930m

Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.

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Hard

Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.

Moderate
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Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

Hard

Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.

Hard

Moderate hike. Good fitness required. Mostly accessible paths. Sure-footedness required.

Moderate
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Popular around Oô

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GR 10 – Central Pyrenees crossing the Pyrenees

Hiking Collection by

Luc Gesell

Tips from the Community

Clément Delhon
September 25, 2025, Lac d'Espingo and Refuge d'Espingo

Splendid view of the surrounding peaks.

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Very pleasant family outing

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Tzommer
July 23, 2025, Lac d'Oô

Main views of Lac de Oô and its waterfall.

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Here the valley opens up to reveal a pretty plain. Continue up the valley to Lake Oô, to enjoy more magnificent views.

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Paul_C
November 11, 2024, Vue sur le Lac d'Oô

Hike to the stunning Lac d’Oô, a beautiful glacial lake nestled in the Pyrenees. As you approach the lake, you’ll be treated to breathtaking views of its clear, turquoise waters, surrounded by sheer cliffs and lush forest. The hike is moderately challenging, with rocky paths leading to a perfect viewpoint where the lake and surrounding peaks create a truly picturesque scene. Take some time to appreciate the tranquility of the area, where you can also catch a glimpse of the impressive Oô waterfall cascading down the mountainside.

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Very beautiful and picturesque hiking, the lake is definitely worth a visit. The entire route is about 10 kilometers and the elevation gain is only 400 meters. We climb up a winding rocky path surrounded by forest, and then a beautiful view of the valley and lake opens up. We also tried to go around the lake in a circle on the right side, we managed to reach the waterfall without problems, and then we would have had to ford the river, which we did not do.

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cs 🦦
August 15, 2023, Lac d'Oô

Beautiful turquoise blue reservoir in the middle of the Pyrenees

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Nice waterfall - cools the head in high temperatures

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Frequently Asked Questions

How many hiking trails are available in Oô?

Oô offers a diverse selection of over 15 hiking routes, catering to various skill levels. You'll find options ranging from easy strolls to challenging high-mountain ascents, with 2 easy, 8 moderate, and 8 difficult trails.

Are there easy or family-friendly hiking options in Oô?

Yes, Oô has several accessible options suitable for families. The path to Lac d'Oô from Les Granges d'Astau is particularly popular and considered accessible for most, requiring about 1 to 1.5 hours of easy walking. There are 2 easy trails in the region, perfect for a relaxed outing.

Where can I find impressive waterfalls in Oô?

The most iconic waterfall is the Cascade d'Oô, a magnificent 275-meter single-drop waterfall feeding Lac d'Oô. You can experience its grandeur on routes like the View of the plain – View of the Lac d'Oô waterfall loop from Oô. Other notable waterfalls in the area include Cascade d'Enfer and Espigantosa Waterfall, especially vibrant during spring snowmelt.

Are there any circular hiking routes around Oô?

Yes, Oô features several rewarding circular routes. A popular option is the View of the plain – Lac d'Oô loop from Granges d'Astau, a 9.3-mile trail offering stunning mountain scenery. Another great choice is the View of the plain – View of the Lac d'Oô waterfall loop from Oô, which provides excellent views of the famous waterfall.

What are some challenging hikes for experienced trekkers in Oô?

For experienced hikers, Oô offers several demanding routes. The From Astau Barns to Saussat Lake via Oô Lake and Espingo Lake is a difficult 8.3-mile trail connecting multiple glacial lakes. For an even greater challenge, consider Route 11: Pic du Perdiguère, a 17.6-mile path exploring high-altitude terrain and the colossal Perdiguero massif. There are 8 difficult trails in total.

Can I bring my dog on the hiking trails in Oô?

Many trails in the Pyrenees are dog-friendly, but it's always best to check specific regulations for each route, especially those passing through protected areas or near refuges. Generally, dogs are welcome on leash, but be mindful of livestock and wildlife. Always carry water for your dog and clean up after them.

What are the main attractions or points of interest to see while hiking in Oô?

The primary attraction is Lac d'Oô and its spectacular 275-meter waterfall. Beyond this, hikers can explore other stunning high-altitude lakes like Lac d'Espingo and Lac Saussat. The region is also part of the GR10 long-distance trail, offering access to dramatic Pyrenean peaks and diverse mountain environments. You might also encounter mountain passes such as Peyresourde Pass and Port de Balès.

What do other hikers say about the trails in Oô?

The trails in Oô are highly regarded by the komoot community, boasting an average rating of 4.5 stars from over 1,700 reviews. Hikers frequently praise the stunning glacial lakes, the dramatic Pyrenean peaks, and the impressive waterfalls, highlighting the diverse and breathtaking mountain scenery.

How long do hikes in Oô typically take?

Hike durations in Oô vary significantly depending on the trail's difficulty and length. An easy family-friendly walk to Lac d'Oô might take 1 to 1.5 hours one way. More challenging routes, like the From Astau Barns to Saussat Lake, can take around 6 hours, while extensive high-altitude treks such as Route 11: Pic du Perdiguère can extend to over 14 hours.

Where can I park when starting a hike in Oô?

A common starting point for many hikes, including the popular trail to Lac d'Oô, is Les Granges d'Astau. This area typically offers parking facilities for hikers accessing the trails into the Oô valley.

What is the best time of year to go hiking in Oô?

The best time for hiking in Oô is generally from late spring to early autumn (May to October). During spring, snowmelt enhances the waterfalls, while autumn offers vibrant colors. Summer provides warmer temperatures and longer daylight hours. Winter can be suitable for snowshoeing, but many higher trails become inaccessible due to snow and ice.

Are there opportunities for multi-day treks in Oô?

Yes, Oô is a significant section of the GR10 long-distance hiking trail, which traverses the Pyrenees. This provides excellent opportunities for multi-day treks. Hikers can plan longer journeys, utilizing refuges along the way for overnight stays.

Are there any refuges or places to stay overnight on longer hikes?

For those undertaking multi-day treks or longer day hikes, there are refuges available in the Oô region. Notable options include Refuge du Lac d'Oô and Refuge d'Espingo, which offer food, drinks, and overnight accommodation, providing essential services for hikers in the high mountains.

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