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The Stone Bridge – Port of La Madelon loop from Fort-Mahon-Plage

Routes

Mountain biking trails

The Stone Bridge – Port of La Madelon loop from Fort-Mahon-Plage

Moderate

4.5

(20)

riders

The Stone Bridge – Port of La Madelon loop from Fort-Mahon-Plage

02:13

39.7km

30m

Mountain biking

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: July 22, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc naturel régional Baie de Somme Picardie Maritime

Parc naturel marin des Estuaires picards et de la mer d'Opale

Waypoints

Start point

Parking

Get Directions

8.65 km

The Stone Bridge

Highlight • Bridge

The La passerelle de l'Authie, inaugurated in April 2022, is a 52-meter-long pedestrian and cycle structure that facilitates the safe crossing of the Authie river. Connecting the departments of Somme …

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9.09 km

Château d'Authie

Highlight • Castle

It is in the small village of Conchil-le-Temple that the castle of Pas d'Authie is erected. Towards the middle of the 19th century, Baron de Torcy Félix Moulart had a …

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10.5 km

Foraine d’Authie Observatory

Highlight • Viewpoint

The Foraine d’Authie site is made up of a series of bodies of water resulting from the exploitation of old pebble cords. This former quarry, in the process of being …

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15.5 km

New Cycle Path

Highlight • Cycleway

28.5 km

Port of La Madelon

Highlight • River

Once flourishing under the protection of Waben Castle, the port of Madelon, with its medieval Berck fishing fleet, evolved into a marina due to the siltation of Authie Bay. Today, …

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30.1 km

Baie d'Authie Nature Reserve

Highlight • Natural

The path for along the nature reserve

Le chemin pour le long de la reserve naturelle

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31.8 km

Footbridge over the Authie

Highlight • Bridge

Uberquerung der Authie 💦

Crossing L’Authie 💦

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39.7 km

Baie d'Authie

Highlight • Beach

Vast marine marshland, the Authie bay is home to remarkable fauna and flora. The wild landscapes are very diverse. They alternate between salt meadows, ponds and dunes.

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39.7 km

End point

Parking

Way Types & Surfaces

Way Types

22.7 km

7.14 km

4.70 km

4.68 km

320 m

< 100 m

Surfaces

23.3 km

8.51 km

7.43 km

301 m

221 m

Elevation

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

Weather

Friday 24 July

25°C

12°C

0 %

Additional weather tips

Max wind speed: 22.0 km/h

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The Stone Bridge – Port of La Madelon loop from Fort-Mahon-Plage

The Stone Bridge

Château d'Authie

Foraine d’Authie Observatory

New Cycle Path

Port of La Madelon

Baie d'Authie Nature Reserve

Footbridge over the Authie

Baie d'Authie

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