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

The Port House – Observatoire le Rocher loop from Lavau-sur-Loire

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

The Port House – Observatoire le Rocher loop from Lavau-sur-Loire

Hard

13

riders

The Port House – Observatoire le Rocher loop from Lavau-sur-Loire

02:51

37.8km

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: October 1, 2026

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 •

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3

4.40 km

Path Through the Marshes

Highlight (Segment) • Trail

WARNING: on the dirt/grass part, towards the middle of the segment, there is, in the center of the road, an armored concrete crossbar with scrap metal coming out of it, …

Translated by Google •

Tip by

4

7.29 km

Observatoire le Rocher

Highlight • Viewpoint

Wonderful landscape. to do from spring (flooded in winter)

Translated by Google •

Tip by

13.1 km

Ruins

Ruins

20.7 km

la citrais

Forest

7

25.3 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

8

26.1 km

View of the Countryside

Highlight • Viewpoint

View of the Loire Valley

Showing Translation

Tip by

9

27.1 km

Fresnier Marsh Trail

Highlight • Trail

A pretty path connecting the town of Savenay to Grand Brossais, the northern gateway to the Syl marsh.

Showing Translation

Tip by

10

31.0 km

Marsh crossing

Highlight • Other

B

37.8 km

End point

Parking

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Way Types & Surfaces

Way Types

17.7 km

11.8 km

4.09 km

2.11 km

2.03 km

< 100 m

Surfaces

15.0 km

13.5 km

5.82 km

3.39 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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Friday 9 October

17°C

9°C

0 %

Additional weather tips

Max wind speed: 14.0 km/h

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