Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Login or Signup

Routes
Running trails & routes
France
New Aquitaine
Oloron-Sainte-Marie
Etsaut

Chemin de la Mâture – Ossau Valley loop from Fort du Portalet

Routes
Running trails & routes
France
New Aquitaine
Oloron-Sainte-Marie
Etsaut

Chemin de la Mâture – Ossau Valley loop from Fort du Portalet

Hard

13

runners

Chemin de la Mâture – Ossau Valley loop from Fort du Portalet

05:52

34.4km

2,220m

Running

Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required. The starting point of the route is right next to a parking lot.

Last updated: March 3, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc national des Pyrénées (cœur)

Parc national des Pyrénées (Aire d'adhésion)

Waypoints

A

Start point

Parking

Get Directions

1

519 m

Chemin de la Mâture

Highlight (Segment) • Other

The Chemin de la Mâture is a 1200 meter long tunnel carved into the cliff. Its work is ordered by Louis XV to allow the exploitation and the routing of …

Translated by Google •

Tip by

10.3 km

Col de Larry

Mountain Pass

3

10.7 km

Ayous Pass

Highlight • Mountain Pass

The Col d'Ayous is located at the foot of the eponymous peak, at an altitude of 2,188 meters. It allows you to reach the Aspe valley from the Ossau valley. …

Translated by Google •

Tip by

4

12.4 km

Refuge d'Ayous

Highlight • Mountain Hut

The Ayous refuge is open from the end of May to the beginning of October. For the precise dates, which change from one year to the next, you can go …

Translated by Google •

Tip by

5

13.7 km

Lake Bersau

Highlight • Lake

Lake Bersau is located 2,080 meters above sea level, at the foot of Pic Casterau. It is one of the six lakes of Ayous which mark out the paths of the Pyrenean Haute Route and the GR10, in this sector.

Translated by Google •

Tip by

15.1 km

Lac Castérau

Lake

7

19.1 km

Ossau Valley

Highlight • Gorge

This valley follows the course of the Gave de Bious and offers a superb deep and clear panorama. A green expanse in contrast with the passes, peaks and rocky massifs …

Translated by Google •

Tip by

8

21.2 km

Lac Roumassot

Highlight • Lake

Lake Roumassot is the lowest of the Ayous lakes. This natural lake of glacial origin is located at an altitude of 1,845 meters and serves as a summer pasture for …

Translated by Google •

Tip by

9

21.7 km

Lac du Miey

Highlight • Lake

Lac de Miey is located at an altitude of 1,914 meters in the Ossau valley. It is located between Lake Gentau higher up and Lake Roumassot below.

Translated by Google •

Tip by

10

22.1 km

Lac Gentau

Highlight • Lake

The Ayous lakes form a group of six lakes: Castérau, Miey, Gentau, Bersau, Paradis and Roumassot.

Arranged in stairs, they form a magnificent amphitheater to land and admire the Pic du Midi d'Ossau.

Translated by Google •

Tip by

30.5 km

Borde de Rouglan (Ruine)

Ruins

33.5 km

Point de vue sur le Fort du Portalet

Viewpoint

B

34.4 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

24.2 km

8.76 km

1.43 km

< 100 m

Surfaces

25.8 km

5.13 km

2.15 km

1.31 km

< 100 m

Sign up to see more specific route details

Sign up for free

Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (2,170 m)

Lowest point (730 m)

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Friday 22 May

21°C

4°C

3 %

Additional weather tips

Max wind speed: 8.0 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.

Save

Edit route

Download GPX

Move start point

Print

Share

Embed on a website

Report an Issue

Nearby routes

Hard

5.0

183

Tour of the Pic du Midi d'Ossau – running in the Ossau Valley

03:17h

16.7km

1,100m

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy