Grotte du Mas-d'Azil – The tunnels of Véloroute 81 loop from Castelnau-Durban

Mountain biking trails

Grotte du Mas-d'Azil – The tunnels of Véloroute 81 loop from Castelnau-Durban

Hard

riders

Grotte du Mas-d'Azil – The tunnels of Véloroute 81 loop from Castelnau-Durban

02:46

40.8km

690m

Mountain biking

Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is accessible with public transport.

Last updated: September 16, 2026

Tips

Includes a segment that is highly dangerous

A part of this route comprises highly technical, difficult, or hazardous terrain. Specialist equipment and prior experience is required.

After 17.0 km for 11 m

Waypoints

Start point

Bus stop

Get Directions

16.7 km

View of the Grotte du Mas-d'Azil

Highlight • Viewpoint

By this detour, you avoid going through the road that crosses the cavity right through. It is certainly one of the most beautiful views of this unique cave.

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17.2 km

Grotte du Mas d'Azil

Highlight • Cave

The cave of Mas D'azil is an eponymous site: that is to say that it bears the name of a prehistoric culture: the Azilian. It is very impressive because a …

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17.5 km

North Corniche

Highlight • Other

From this ledge of the cave, in addition to walking under the vault, you can enjoy lovely views of the village and the Arize.

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17.8 km

Grotte du Mas-d'Azil

Highlight • Cave

In this magnificent prehistoric cave, crossed in its entirety by both the Arize river and a road, prehistoric portable art dating from the Azilian was discovered. The most famous of …

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18.7 km

The Arize

Highlight • Other

19.1 km

Le Mas-d'Azil

Highlight • Settlement

Mas-d'Azil is famous for its prehistoric cave, a major site of European archaeology. The village also attracts with its church and its picturesque streets.

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23.2 km

Church of the Immaculate Conception and Raynaude Calvary

Highlight • Religious Site

Catholic Church of Raynaude et son Calvaire, completed in 1895. The 14 separate chapels on the hill behind the church depicts the 14 scenes of the Roman Catholic Way of the Cross.

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35.3 km

The tunnels of Véloroute 81

Highlight (Segment) • Cycleway

This magnificent 44-kilometre greenway has been developed between Saint-Girons and Foix, replacing an old railway line. It has many tunnels which have the particularity of being equipped with motion detectors.

You will therefore be enlightened as you progress underground.

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40.8 km

End point

Bus stop

Way Types & Surfaces

Way Types