Montagnes Noires

The Montagnes Noires (French pronunciation: [mɔ̃taɲ nwaʁ], 'black mountains'), also known as the Montagne Noire (French, 'black mountain')[1] and in Breton as Menez Du[2] are an east–west oriented range of hills in Brittany centred on the town of Gourin.

They culminate in the peak of Roc de Toullaeron (Breton: Roc'h Toull-al-Laeron) which attains a height of either 318m[3] or 326m.

[4] Other significant peaks include Ar Menez (304m) and Montagne Noire (307m) (or, in Breton: Menez Du).

[5] They are composed from a range of Precambrian, Ordovician, Silurian and Devonian rocks forming a part of the Variscan orogen and include sandstones, quartzites and slates.

[6] The hills form a part of the border between the départements of Finistère and Morbihan and just extend into Côtes-du-Nord.