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Hiking trails & Routes

France

Morbihan

Groix

Port Lay – Groix loop from Groix

Routes

Hiking trails & Routes

France

Morbihan

Groix

Port Lay – Groix loop from Groix

Moderate

4.9

(13)

111

hikers

Port Lay – Groix loop from Groix

03:36

13.7km

120m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 13, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Réserve naturelle François Le Bail

Waypoints

Start point

Bus stop

Get Directions

1.13 km

Port Lay

Highlight • Other

Magnificent little typical port of Groix with its famous house overlooking the quay. Charm guaranteed whatever the time of day to savor different lights.

Translated by Google •

Tip by

2.40 km

Grognon Auxiliary Battery – underground fortification

Highlight • Other

This battery had been part of Fort du Grognon since the mid-1700s and had an underground powder magazine. This is where the gunpowder was stored. It was used in successive wars and adapted to advances in artillery over the centuries.

Translated by Google •

Tip by

7.71 km

View of the cliffs on Île de Groix

Highlight • Viewpoint

13.7 km

End point

Bus stop

Way Types & Surfaces

Way Types

9.65 km

3.05 km

416 m

328 m

239 m

Surfaces

9.72 km

3.09 km

412 m

214 m

198 m

< 100 m

Elevation

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

Weather

Friday 3 July

24°C

16°C

0 %

Additional weather tips

Max wind speed: 24.0 km/h

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Comments

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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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Port Lay – Groix loop from Groix

Port Lay

Groix

Grognon Auxiliary Battery – underground fortification

View of the cliffs on Île de Groix

Nearby routes

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