Réserve naturelle nationale des Hauts de Chartreuse, National nature reserve in Chartreuse Mountains, France.
The Réserve naturelle nationale des Hauts de Chartreuse is a 4,450-hectare national nature reserve stretching about 20 km from Mont Granier to the Dent de Crolles. It occupies a perched syncline, a rocky plateau between 900 and 2,062 metres bordered by steep limestone walls. Beech-fir forests, subalpine spruce stands and summit grasslands with dwarf pines cover the plateau, and a pale limestone cliff with a grassy top rises above the tree line.
A first request to protect the site was made in 1978. The reserve was created by decree no. 97-905 of 1 October 1997, after development projects threatened the plateau. Since 2001, management has been delegated to the Syndicat mixte du Parc naturel régional de la Chartreuse.
The seven alpine pastures within the reserve show how traditional farming still shapes the landscape today, with herds grazing across open meadows. Visitors walking through these areas can see how rural life and nature conservation work together here.
Visitors explore the reserve by following marked trails while respecting strict rules designed to protect the natural habitat. Dogs are not permitted, and plant collection or open fires are forbidden to safeguard the environment.
The massif holds more than 250 km of explored karst networks, including the Balme à Collomb, a cave exceptionally rich in cave bear bones. The Aulp-du-Seuil archaeological site preserves a Mesolithic mountain occupation unique in the Alps.
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