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Port Tréhiguier – Arzal Dam loop from Pénestin

Port Tréhiguier – Arzal Dam loop from Pénestin

Moderate

riders

Port Tréhiguier – Arzal Dam loop from Pénestin

01:40

38.2km

340m

Road cycling

Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride. The starting point of the route is accessible with public transport.

Last updated: June 27, 2026

Tips

Includes a segment in which cycling is not permitted

After 3.27 km for 86 m

Waypoints

Start point

Bus stop

Get Directions

3.31 km

Tréhiguier Lighthouse

Highlight • Monument

Adjoining its port, the Tréhiguier lighthouse is a former semaphore, erected in 1880 then closed in 1989. Today, it is open to the public during the summer and hosts numerous exhibitions. Also, it is possible to climb to its summit to enjoy a panoramic view of the Vilaine estuary.

Translated by Google •

Tip by

3.49 km

Port Tréhiguier

Highlight • Structure

Small charming harbor overlooking the Vilaine estuary. Some very nice restaurants and bars for a mid-term coffee or to fill your cans!

Translated by Google •

Tip by

3.53 km

Billiers

Highlight • Settlement

3.57 km

The annex at the Port of Tréhiguier

Highlight • Other

It's a very nice place by the sea, with a wide choice of wines, beers and cocktails from all over the world. The café opens every day at 7:30 am (except Monday, closing day), so you can also have breakfast there. There are even concerts and events organized, mainly in the summer.

Translated by Google •

Tip by

11.4 km

Arzal Dam

Highlight • Monument

The Arzal dam is built on the Vilaine estuary between Arzal and Camoël. It is the largest estuary dam in Europe. It is 500 meters long and has a sea wall and five gates. To allow circulation between the river and the ocean, the dam has a lock. A port is also located nearby.

Translated by Google •

Tip by

12.3 km

Arzal Dam

Highlight • Structure

This is an artificial dam on La Vilaine. There is an information board with the history of this structure.
Here you can consult information on the lock times:
lavilaine.com/index.php/fr/eclusages-du-jour

Translated by Google •

Tip by

19.7 km

Prières Abbey boundary marker

Highlight • Historical Site

Bollard marking the limit of the Abbey of Prayers, created between 1248 and 1252, it was located in Billiers near the tip of Penlann. The abbey was largely destroyed during the revolution, there are still a few buildings, the bell tower and a few markers on the edge of its domain, this marker is the easiest to find it is decorated with a Macle, heraldic symbol and 'an Ermine, symbol of the Dukes of Brittany who founded the abbey

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38.2 km

End point

Bus stop

Way Types & Surfaces

Way Types

31.0 km

4.69 km

2.17 km

252 m

< 100 m

Surfaces

37.1 km

684 m

304 m

Elevation

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

Weather

Saturday 11 July

38°C

23°C

0 %

Additional weather tips

Max wind speed: 24.0 km/h

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Port Tréhiguier – Arzal Dam loop from Pénestin

Tréhiguier Lighthouse

Port Tréhiguier

Billiers

The annex at the Port of Tréhiguier

Arzal Dam

Arzal Dam

Prières Abbey boundary marker

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