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France
Bourgogne-Franche-Comté
Territoire-de-Belfort
Rougemont-Le-Château

Sudel Observatory

Highlight • Historical Site

Sudel Observatory

Hiking

4.3

(13)

Running

5.0

(2)

Cycling

5.0

(1)

Mountain biking

5.0

(1)

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Parc naturel régional des Ballons des Vosges

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  • Location: Rougemont-Le-Château, Territoire-de-Belfort, Bourgogne-Franche-Comté, France

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    October 1, 2026

    Hiking

    After the Treaty of Frankfurt in 1871, which gave Alsace to Germany, the new Franco-German border passed here, hence the presence of a boundary stone at this spot. At the time, a 40-meter-high observatory had also been installed to monitor the fortified city of Belfort.
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    Nearby routes

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    4.8

    (13)

    47

    hikers

    #1.

    Lochberg Pass (920 m) – Lac du Lachtelweier loop from Source de la Doller

    14.8km

    04:31

    510m

    520m

    Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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    Moderate
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    Hard hike. Very good fitness required. Mostly accessible paths. Sure-footedness required.

    Hard
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    Hard hike. Good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

    Hard

    Details

    Informations

    Elevation 910 m

    Weather

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    Wednesday 14 October

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    Additional weather tips

    Max wind speed: 6.0 km/h

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    Location: Rougemont-Le-Château, Territoire-de-Belfort, Bourgogne-Franche-Comté, France

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