Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required. The starting point of the route is right next to a parking lot.

Last updated: November 13, 2025

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Your route passes through a protected area

Please check local regulations for:

Parc national des Pyrénées (Aire d'adhésion)

Waypoints

Start point

Parking

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30 m

Portet Pass

Highlight • Other

Culminating at 2,215 meters above sea level, it is the highest pass in the Pyrenees taken by a road.
Overlooking the village of Saint-Lary Soulan, it offers a lovely panorama of the valley.

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2.72 km

View of the Lac de l'Oule Dam

Highlight • Viewpoint

Very nice view of the dam, the hike leading to Lac de Bastan is very nice, especially when you start to see the refuge and the lake.

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4.38 km

Lower Lake

Highlight • Other

a superb hike to do. Very impressive when the dam is under construction and the lake is almost empty.

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5.36 km

Middle Bastan Lake

Highlight • Lake

The middle lake lies, as its name suggests, between the lower and upper lakes. The three of them form a string of lakes called the Bastan lakes. Of glacial origin, …

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5.72 km

Bastan Refuge

Highlight • Restaurant

The Bastan refuge is located a little higher up, on the shores of Lac du Milieu. It is open from the last weekend of May to the first weekend of …

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6.07 km

Upper Bastan Lake

Highlight • Lake

The upper lake of Bastan is the last and the highest (2260 meters above sea level) of the three lakes of Bastan.

This set owes its name to its staircase …

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7.60 km

Col de Bastanet

Mountain Pass

10.7 km

Lower Bastan Lake

Highlight • Lake

The lower lake forms a peaceful and preserved lake site, out of sight. You will have the feeling of entering a crater as it is protected by its environment. This …

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12.0 km

Lake L'Oule

Highlight • Other

17.8 km

End point

Parking

Way Types & Surfaces

Way Types

11.6 km

4.85 km

1.21 km

< 100 m

Surfaces

11.3 km

3.20 km

2.87 km

328 m

Elevation

Highest point (2,470 m)

Lowest point (1,820 m)

Weather

Tuesday 23 December

4°C

-6°C

31 %

Additional weather tips

Max wind speed: 6.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Middle Bastan Lake – Lower Bastan Lake loop from Aragnouet

Portet Pass

View of the Lac de l'Oule Dam

Lower Lake

Middle Bastan Lake

Bastan Refuge

Upper Bastan Lake

Lower Bastan Lake

Lake L'Oule

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