Lac d'Oô, Mountain lake in Haute-Garonne, France.
This body of water extends across 42 hectares at an altitude of 1,507 meters (4,944 feet), reaching depths of 67 meters (220 feet) in the French Pyrenees.
Previously known as Séculéjo until the 1800s, the facility received its current dam infrastructure in 1921 for hydroelectric generation purposes.
Painter Louis-François Lejeune documented this location in 1834, establishing it as a subject in French artistic representations of the Pyrenees mountain ranges.
The GR10 hiking route connects the Granges d'Astau parking facility to this destination through a one-hour walk on marked trails.
The facility holds 13 million cubic meters of water, supplying a 30-megawatt power station while maintaining habitat conditions suitable for trout populations.
Location: Haute-Garonne
Elevation above the sea: 1,507 m
Address: Lac d'Oô, 31110 Oô, France
GPS coordinates: 42.74000,0.49200
Latest update: December 12, 2025 17:48
Occitanie hosts a wide variety of lakes spread between the Pyrenees and the Massif Central. Natural lakes mainly occupy high-altitude zones in the Pyrenees, where glacial erosion has carved out cirques and basins now filled with water. Lake Oô, located at 4,950 feet (1,507 meters) altitude, receives...
Lac du Portillon
4.6 km
Lac d'Espingo
1.3 km
Guargas Blancas
4.6 km
Grand Quayrat
3.5 km
Pic des Spijeoles
3.4 km
Cirque des Crabioules
4.6 km
Pic de Céciré
4.2 km
Pic Lézat
4.2 km
Pic de Hourgade
3.6 km
Punta Lourde Rocheblave
4.7 km
Pic Jean Arlaud
4.6 kmBelloc Central
3.1 kmAgulla Inferior de Lézat
4.3 km
Pic Gourdon
3.9 kmTorre Armengaud
4.7 kmAgulla Superior de Lézat
4.3 kmBelloc S
3.2 kmPunta Lacq
4.8 kmPico del Puerto de O
4.6 kmCol de la Coumme
3.3 kmScenic viewpoint
4.9 kmScenic viewpoint
1.4 kmScenic viewpoint
1.3 kmScenic viewpoint
2.4 kmRu d'Enfer
4.7 kmEmile Durront
619 mCascade d'Ôo
651 mCascade Chevelure de la Madeleine
2.1 kmVisited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes