Béa's column "The watershed line"

When this water falls, it follows the contours of the mountain. It flows down the natural slope to form the main watercourse at the bottom of the valley.

The rain that falls and runs down the slopes of Valleraugue forms the Hérault River and continues its journey to the Mediterranean. The water flowing towards Dourbies does not follow the same route: it ends its course in the ocean…

This imaginary line, which comes from the Pyrenees, goes up and crosses Espérou and continues to its summit of Aigoual, then passes through Aire de Côte, the Col Salidès, the Cam de l'Hospitalet… 

This watershed boundary continues by crossing the Bougès via the Jalcreste pass, then continues its route between Pic Cassini and the Aigle pass on Mont Lozère. 

It's up to you to find his route all the way to the Alps!

The watershed line marks a boundary on the ground: the cadastral boundaries between two municipalities. For example, this boundary crosses and divides the village of L'Espérou in two: one village/two municipalities – Valleraugue (Val d'Aigoual) and Dourbies. This watershed line often serves as the legal basis for delimiting borders in mountainous areas, as is the case, for example, in the Alps between France and Italy.