Alagnon

The Alagnon is a French river that starts in the Massif Central within the Regional Natural Park of the Volcanoes of Auvergne () and that flows through the Auvergne-Rhône-Alpes region. It is a left tributary of the Allier.
Geography.
The Alagnon river has a length of and a drainage basin with an area of . 
Its average yearly discharge (volume of water which passes through a section of the river per unit of time) is at Lempdes-sur-Allagnon in the Haute-Loire department.
Average monthly discharge (m3/s) at Lempdes-sur-Allagnon (50 years)
Course.
The Alagnon river starts in the Mounts of Cantal (Massif Central), near the "Puy Bataillouse" mountain, "commune" of Laveissière, at an altitude of about , in the Cantal department. First, it flows to the east, near the Super Lioran ski resort, and gets into a gorge and, then, into a valley near Murat. The river flows in general to the northeast and gets into deep gorges in Lempdes-sur-Allagnon.
The Alagnon river flows through the Auvergne-Rhône-Alpes region, 3 departments and 23 "communes". Two "communes" are named after the river: La Chapelle-d'Alagnon and Lempdes-sur-Allagnon. It flows through the following "communes", among others:
Finally, it flows into the Allier river in the town of Auzat-la-Combelle, in the place known as "Le Saut du Loup", in the Puy-de-Dôme department.
Main tributaries.
The main tributaries, over 20 km long, of the Cère river are:
Left tributaries:
Right tributaries: