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Le Mont-Saint-Michel

The dam on the Couesnon

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The dam on the Couesnon

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    Location: Le Mont-Saint-Michel, Avranches, Manche, France

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    July 23, 2020

    Road cycling

    This dam, built as part of the work to restore the island character of Mont Saint Michel, aims to flush out the sediment accumulated around the mountain and thus lower the level of the shores.
    At high tide, the floodgates are opened to allow water to rise into the Couesnon River. This water is then released at low tide to create a "flushing" effect that pushes the sediment away.
    projetmontsaintmichel.com/organisez_votre_visite/lachers_d_eau_du_barrage.html
    Translated by

    July 8, 2021

    Road cycling

    Recent dam to solve the problem of silting up the mountain.
    Translated by

    May 12, 2025

    Road cycling

    Spectacular technology and architecture fusion, worth spending 20-30 min to admire

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    Best Road Cycling Rides to The dam on the Couesnon

    4.4

    (29)

    603

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    1. The dam on the Couesnon – The Bay of Mont-Saint-Michel loop from La Gouesnière - Cancale - Saint-Méloir-des-Ondes

    77.7km

    03:09

    140m

    140m

    Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.

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    Moderate

    Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.

    Moderate

    Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.

    Moderate

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    Thursday 22 January

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    Max wind speed: 36.0 km/h

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    Location: Le Mont-Saint-Michel, Avranches, Manche, France

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