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Routes
Bike touring routes & trails
France
Pays de la Loire
Saint-Nazaire
Lavau-Sur-Loire

Observatoire le Rocher – Mabille Valley Lake loop from Lavau-sur-Loire

Routes
Bike touring routes & trails
France
Pays de la Loire
Saint-Nazaire
Lavau-Sur-Loire

Observatoire le Rocher – Mabille Valley Lake loop from Lavau-sur-Loire

Hard

14

riders

Observatoire le Rocher – Mabille Valley Lake loop from Lavau-sur-Loire

02:46

37.1km

290m

Cycling

Hard bike ride. Good fitness required. You may need to push your bike for some segments of this route. The starting point of the route is right next to a parking lot.

Last updated: April 25, 2026

Tips

Includes a segment in which cycling is not permitted

After 25.5 km for 122 m

Waypoints

A

Start point

Parking

Get Directions

1

224 m

Lavau-sur-Loire

Highlight • Other

The old Saint-Martin du Sillon church has been listed as a historical monument since 1984.
Several beautiful old houses around this small town center.

Translated by Google •

Tip by

2

386 m

The Port House

Highlight • Cafe

This beautiful residence, which currently houses a crêperie, served as a model for the Maison dans la Loire, a work that can be seen in Couëron.
The small port in …

Translated by Google •

Tip by

3

4.66 km

Marais du Syl Observatory

Highlight • Viewpoint

Allows you to observe the surrounding flora and fauna

Translated by Google •

Tip by

4

6.22 km

Observatoire le Rocher

Highlight • Other

Allows you to observe the surrounding flora and fauna

Translated by Google •

Tip by

12.1 km

Ruins

Ruins

6

12.5 km

Pâquelais Mill

Highlight • Other

Built around 1545, the Moulin de la Pâquelais is a remarkable building located to the east of Savenay. After a restoration in 1991, the mill became functional again. It has been listed as a historic monument since 1996.

Translated by Google •

Tip by

19.9 km

la citrais

Forest

8

24.5 km

Mabille Valley Lake

Highlight • Other

The Lac de la Vallée Mabille, or Lac de Savenay, is a beautiful artificial reservoir that is worth a detour. By bike, you can easily go around the southern part …

Translated by Google •

Tip by

9

25.3 km

Mabille Valley Lake

Highlight • Lake

Lac de la Vallée Mabille, more commonly known as Lac de Savenay, is a beautiful body of water located at the eastern entrance to the town of Savenay. Artificial, the …

Translated by Google •

Tip by

10

30.3 km

Marsh crossing

Highlight • Other

B

37.1 km

End point

Parking

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Way Types & Surfaces

Way Types

16.2 km

13.6 km

4.29 km

2.03 km

941 m

< 100 m

Surfaces

14.1 km

13.9 km

5.35 km

3.65 km

158 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 (90 m)

Lowest point (0 m)

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Weather

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Saturday 23 May

32°C

16°C

0 %

Additional weather tips

Max wind speed: 18.0 km/h

to get more detailed weather forecasts along your route

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

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