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Routes
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France
Brittany
Vannes
Le Guerno

Arzal Dam – Port Tréhiguier loop from Le Guerno

Routes
Road cycling routes
France
Brittany
Vannes
Le Guerno

Arzal Dam – Port Tréhiguier loop from Le Guerno

Moderate

5.0

(1)

17

riders

Arzal Dam – Port Tréhiguier loop from Le Guerno

03:12

75.2km

560m

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: August 23, 2026

Tips

The surface along some of this route may not be suitable

Some segments of your route comprise a surface that may not be suitable for your chosen sport.

After 12.4 km for 137 m

After 19.8 km for 123 m

Waypoints

A

Start point

Bus stop

Get Directions
1

806 m

Sainte-Anne Fountain

Highlight • Monument

2

7.84 km

3

12.5 km

Arzal Dam

Highlight • Monument

Built in 1970, the Arzal dam allows the regulation of the waters of the Vilaine and the storage of drinking water for the inhabitants of the region. Its construction allowed …

Translated by Google •

Tip by

4

15.4 km

Saint Martin Church

Highlight • Religious Site

Neo-Gothic style church built in 1877, it replaces an old 11th-century Romanesque church that had become too small and dilapidated.
Interesting small built heritage in the village center.

Showing Translation

Tip by

5

15.4 km

War Memorial

Highlight • Monument

6

20.4 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

7

27.5 km

Plage de Loscolo

Highlight • Beach

After accessing the beach, there's a viewpoint with two benches to admire the landscape. Magical!

Translated by Google •

Tip by

8

74.2 km

Fontaine Sainte-Marie

Highlight • Other

This fountain was built in 1787. It was included on the list of historic monuments in 1928. It is topped with a stone cross and was used for religious purposes …

Translated by Google •

Tip by

B

75.2 km

End point

Bus stop

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Way Types & Surfaces

Way Types

56.1 km

10.5 km

6.97 km

1.52 km

166 m

< 100 m

< 100 m

Surfaces

72.3 km

2.53 km

260 m

150 m

< 100 m

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Elevation

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

Highest point (80 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Tuesday 20 October

15°C

9°C

30 %

Additional weather tips

Max wind speed: 28.0 km/h

to get more detailed weather forecasts along your route

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

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