Puy-de-Dôme, sentinel volcano of the Chaîne des Puys
On September 19, 1648, at dawn, Florin Périer left Clermont with a mercury tube under his arm. His brother-in-law Blaise Pascal had asked him to climb Puy-de-Dôme to prove that air has weight. The mercury dropped by nine centimeters between the plain and the summit. Atmospheric pressure was born, and the volcano entered the history of science.
Why visit Puy-de-Dôme?
This Peléan-type volcano, dormant for about 12,000 years, peaks at 1,465 meters. It towers over the Chaîne des Puys, an alignment of 80 volcanoes inscribed as a UNESCO World Heritage site since 2018 under the name "Chaîne des Puys - Limagne fault tectonic arena". The listing, adopted on 2 July 2018, was granted under UNESCO's geological criterion (viii).
Designated a Grand Site de France since 2008, the summit offers a 360-degree panorama of the volcanoes, the Limagne plain, and Clermont-Ferrand. On a clear day, the Sancy mountains stand out on the horizon. Cones, domes, and maars take shape as if on a scale model.
Getting to the top: train or trail?
The Panoramique des Dômes
Since 2012, an electric rack railway has replaced the old toll road. The Panoramique des Dômes climbs the 565 meters of elevation gain in 15 minutes, following a route that hugs the curves of the volcano. Its arrival station is entirely underground, capped with subalpine lawn that restores the natural look of the summit.
The Muletiers trail and the Goats path
The Muletiers trail starts from the Col de Ceyssat and climbs in switchbacks for 1.9 km with 350 meters of elevation gain. Plan for 45 minutes to an hour. This path follows the route taken by ancient pilgrims who climbed to the temple. The Goats path, starting from the Panoramique parking lot, is longer but less crowded, featuring lovely sections through the forest.
Friendly tip: head up via the Muletiers trail for the panorama and come back down via the Goats path to switch up the views. Check the summit webcam before heading out because the weather changes fast between the plain and 1,465 meters.
At the summit: 2,000 years of open-air history
A 3-kilometer walking path, accessible for wheelchairs, circles the summit. The Temple of Mercury, built in the 2nd century by the citizens of Augustonemetum, covered 3,600 m². It was one of the largest mountain sanctuaries in the Western Roman Empire. Reopened to the public in June 2024 after more than a decade of restoration, the site lets you walk among the ruins and gauge the scale of the structure thanks to partially reconstructed walls.
The Temple of Mercury Space, a free museum at the summit, displays scale models, videos, and replicas of objects found during excavations. An exhibition also traces the feat of aviator Eugène Renaux, who landed his biplane at the summit in 1911 to win a 100,000-franc prize. In good weather, the ballet of paragliders floating above the volcanoes completes the experience.
Take to the skies from the summit by paraglider
Puy-de-Dôme features eight paragliding takeoff zones oriented in all directions, a setup considered unique in Europe. Several schools certified by the FFVL (French Free Flight Federation) offer tandem intro flights year-round, ranging from a 15-minute discovery flight to a 40-minute long-duration flight utilizing thermal uplifts to get close to neighboring volcanoes.
Rates range from $117 to $280* depending on the package chosen, with a video option to keep a record of your flight over the Chaîne des Puys.
Opening hours
The Panoramique des Domes train operates throughout the year, excluding brief periods for maintenance.
High season (July to August): departures every 20 minutes from 9:00 AM to 8:00 PM, with the last descent at 8:20 PM.
Mid-season (April to June, September to October): departures every 40 minutes from 9:00 AM to 7:00 PM.
Winter period: departures every hour from 10:00 AM to 5:00 PM, on select days only.
*Information subject to change
The Puy de Dome is impressive, and you can spot it from a long way off in the landscape.
To reach the summit, cars aren't allowed. You can take the Panoramique des Domes train or ride your bike during the dedicated cycling days.
There are also plenty of hiking trails.
The region is gorgeous, a really great find.