Réseau de l'Alpe, Underground cave network in Chartreuse Mountains, France
The Réseau de l'Alpe extends through limestone formations across three municipalities: Sainte-Marie-du-Mont, Chapareillan, and Entremont-le-Vieux.
In 1947, the Biolet Cave was first explored to a depth of 338 meters, marking the beginning of systematic exploration in this network.
The network includes 37 main entrances and represents a significant destination for French and international cave exploration communities.
The network reaches a total length of 51,042 meters and descends to a depth of 602 meters below the surface.
The underground river system, known as the Jade River, flows through multiple connected cavities within the Urgonian limestone formations.
GPS coordinates: 45.42488,5.91192
Latest update: June 23, 2025 10:01
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Réserve naturelle nationale des Hauts de Chartreuse
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Torrent de Bresson
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Église Saint-Martin de Barraux
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Chapelle Sainte-Catherine du fort Barraux
6 kmReviews
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