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Hiking trails & Routes

Pays de la Loire

Observatoire le Rocher – Mabille Valley Lake loop from Savenay

Hiking trails & Routes

Pays de la Loire

Observatoire le Rocher – Mabille Valley Lake loop from Savenay

Moderate

5.0

(5)

41

hikers

Observatoire le Rocher – Mabille Valley Lake loop from Savenay

02:19

8.77km

80m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: October 7, 2026

Waypoints

A

Start point

Parking

1

1.70 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

2

1.73 km

Ruisseau de Savenay

Highlight • Other

A pretty path follows the trail between the lake and the Syl marsh.

Showing Translation

Tip by

3

5.69 km

Observatoire le Rocher

Highlight • Viewpoint

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

Translated by Google •

Tip by

4

7.82 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

B

8.77 km

End point

Parking

Way Types & Surfaces

Way Types

5.41 km

1.65 km

874 m

834 m

Surfaces

3.74 km

2.39 km

1.50 km

633 m

503 m

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Elevation

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

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Weather

Powered by Foreca

Monday 12 October

22°C

14°C

16 %

Additional weather tips

Max wind speed: 5.0 km/h

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