Route: GR 400 (France)

The GR 400 circumnavigates the Puy Mary Volcano by loops, the itinerary presented here is the biggest loop one can make on this trail. You mainly follow the ridgeline for a while, then go down in the valley to go back up to the next ridge line. It´s a beautiful itinerary with a lot of open views, a lot of springs where you can find some clear water, and trails that are just a joy to run on.

You can find more info here : https://www.mongr.fr/trouver-prochaine-randonnee/itineraire/gr-400-le-tour-du-volcan-cantalien or here : https://www.trekmag.com/topos-trek-topo-gr-400-tour-volcans-cantal