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Morlaix
Plougasnou

The Chasm

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The Chasm

Hiking

5.0

(7)

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  • Location: Plougasnou, Morlaix, Finistère, France

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    August 13, 2026

    Hiking

    impressive rocky notch with emerald waters.
    Its geological origin: It is a tectonic fracture about 2 meters wide. It formed at the level of a vein of softer rocks that were progressively eroded by the impact of the waves, particularly during the sea level rise about 10,000 years ago.
    Its peculiarity: This fault separates the most extreme reef from the rest of the peninsula. At high tide, the waves rush in with force, while at low tide or in calm weather, it forms this magnificent little corridor of translucent green-reflecting water!
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    Nearby routes

    Best routes near The Chasm

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    4.8

    (41)

    233

    hikers

    #1.

    Primel-Trégastel Menhir – Crevasse Cave loop from Primel-Trégastel

    3.11km

    00:50

    30m

    30m

    Easy hike. Easily walkable paths.

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    Easy
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    Easy
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    Easy

    Details

    Informations

    Elevation 70 m

    Weather

    Powered by Foreca

    Sunday 8 November

    14°C

    7°C

    15 %

    Additional weather tips

    Expect light wind and shifting conditions.

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    Location: Plougasnou, Morlaix, Finistère, France

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