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Road cycling routes

Ille-et-Vilaine

Guildo Castle – Quatre Vaux Beach loop from Saint-Lunaire

Road cycling routes

Ille-et-Vilaine

Guildo Castle – Quatre Vaux Beach loop from Saint-Lunaire

Moderate

5.0

(1)

42

riders

Guildo Castle – Quatre Vaux Beach loop from Saint-Lunaire

03:12

72.0km

600m

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 right next to a parking lot.

Last updated: August 24, 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 17.8 km for 430 m

After 29.1 km for 95 m

Waypoints

A

Start point

Parking

1

3.92 km

Frémur Bridge and Bay View

Highlight • Bridge

Nice view of the bay on this bridge which connects the Côtes d'Armor and Ille et Vilaine by crossing the Frémur.

Translated by Google •

Tip by

2

6.22 km

Lancieux Windmill

Highlight • Monument

Beautiful beautiful old windmill

Translated by Google •

Tip by

3

12.7 km

Contemplating low tide 🏝

Highlight • Other

And yes, the ocean has tides and sometimes the landscape looks more like a swamp than a tide.

Translated by Google •

Tip by

4

18.0 km

Guildo Castle

Highlight • Castle

The ruins of the Château du Guildo rise above the mouth of the Arguenon.
The castle was once the property of Prince Gilles of Brittany, whom his own brother, Duke …

Translated by Google •

Tip by

5

21.5 km

Quatre Vaux Beach

Highlight • Beach

A small cove-shaped beach open to oyster beds and bouchots. Magnificent !

Translated by Google •

Tip by

6

29.1 km

Cannon at Pointe de l'Isle

Highlight • Monument

The tip of the Isle looks out over the Atlantic, placid. There you will find a semaphore, an orientation table, and a cannon dating from the mid-18th century. Legend has …

Translated by Google •

Tip by

7

29.5 km

View of Saint-Cast Marina

Highlight • Viewpoint

Nice point to cycle to harbor and views

Translated by Google •

Tip by

8

35.1 km

View of the Bay

Highlight • Viewpoint

B

72.0 km

End point

Parking

Way Types & Surfaces

Way Types

36.5 km

16.3 km

15.6 km

3.01 km

423 m

153 m

149 m

Surfaces

63.1 km

8.43 km

409 m

132 m

< 100 m

< 100 m

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Elevation

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

Highest point (110 m)

Lowest point (0 m)

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Weather

Powered by Foreca

Thursday 22 October

14°C

9°C

26 %

Additional weather tips

Plan for strong wind and challenging conditions.

to get more detailed weather forecasts along your route

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