Lake Castérau is located on the edge of the road to Saint-Jacques-de-Compostelle. It is one of the six lakes of Ayous. Located at the foot of the Castérau peak (2,227 meters above sea level), the lake is also on a beautiful open platform offering a breathtaking view of the Midi d'Ossau peak.

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PyrenäenTomTom

April 13, 2021

Hiking

I've heard the story that the Pic du Midi d'Ossau is also called Jean-Pierre, in reference to the two prominent peaks. Jean and Pierre are said to be two conflicted brothers who have fallen out.

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PyrenäenTomTom

April 13, 2021

Hiking

You pass Lac Casterau if you come from Refuge Ayous and hike the variant over Lac Bersau in the direction of Refuge Pombie. This is a very nice alternative to the GR10 on the HRP.
Tour to the highlight: komoot.de/tour/340519490?ref=itd

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Nearby routes

Best routes near Lac Castérau

4.8

(251)

2,407

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1. Tour of the Ayous Lakes

15.8km

05:29

770m

This difficult 9.8-mile hike in the Pyrenees offers stunning views of Pic du Midi d'Ossau and passes several beautiful glacial lakes.

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Hard

5.0

(9)

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2. Tour of the Ayous Lakes

18.9km

07:50

1,180m

This difficult 11.8-mile (18.9 km) hike from Astún offers stunning Pyrenean lakes and constant views of Pic du Midi d'Ossau.

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Hard

4.9

(23)

370

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3. Ossau Valley – Lac Roumassot loop from Lac Gentau

22.6km

09:41

1,420m

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

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Hard

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Informations

Elevation 1,950 m

Weather

Sunday 15 March

8°C

-4°C

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See nearby routes

Take Me There

Location: Laruns, Oloron-Sainte-Marie, New Aquitaine, France

Other Popular Places to Check Out

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IbonDeLlanosDeSol

Pic du Midi d'Ossau

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Col du Pourtalet

Somport Pass

Trail to Lac de Castérau

Vallée du Bious

Bious

Lac Castérau

1. Tour of the Ayous Lakes

2. Tour of the Ayous Lakes

3. Ossau Valley – Lac Roumassot loop from Lac Gentau

Other Popular Places to Check Out

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