Matheysine

Matheysine is a French Natural region located in the Alps at the south of the Isère département. Its relief is a plateau surroundered by mountains. Matheysine is also called Plateau Matheysin.

The Plateau Matheysin is located in the Isère département, 30 km south of Grenoble when heading to Gap. Included in the overall Taillefer massif, its average elevation is 1,000 m.

Belonging to south-Dauphiné, it is crossed over by the 45th parallel north and roughly matches the boundaries of the canton of La Mure. It is around 20 km long from north to south and around 13 km wide from east to west. At the south and at the west, the border of the plateau is marked by the Drac River, which defines the boundary with Trièves (at the south) and with the Vercors Plateau (at the west). At the north, the plateau ends at the Laffrey slope down to the Romanche valley at the elevation of 350m. At the east, the small mountain range including the summits of Grand Serre (elev. 2,141m.) and Tabor (elev. 2,389m.) marks the boundary with the Valbonnais canton.

Beside these mountains, the plateau is crossed over from north to south by the summits of the Connest Mountain (Peyrouse, Connex) and of the Sénépy. These mountains overlook a succession of four lakes of glacier origin called the Laffrey lakes. From north to south, these lakes are composed of the lac Mort, the Grand lac de Laffrey, the Petichet lake, the Pierre-Châtel lake. Close to the Pierre-Châtel lake can be found one of the so-called Seven Wonders of Dauphiné, a natural arch called the Pierre Percée.

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