The Puy Griou is a summit at an altitude of 1,690 meters in the Mounts of Cantal, located on the ridge line between the valleys of the Cère and the Jordanne [fr], partially situated in the municipalities of Saint-Jacques-des-Blats and Mandailles.

"[1] In the Occitan auvergnat spoken further north of the mountain, it is called Puei de Grion.

However, it has since lost this status, and geologists now consider it to be a phonolite dome occupying a central position similar to other peaks in the massif such as Roc d'Hozières [fr].

[3] During the cold periods of the recent Quaternary, repeated freeze-thaw cycles fractured the rock into slabs, forming a scree mantle.

At the foot of the dome, a trail veers southward, allowing for the ascent of the final 200 meters of elevation gain.