Volcan de Lemptégy

The Volcan de Lemptégy is a volcano in the Chaîne des Puys that was worked for decades as a pozzolana quarry, the red and black volcanic gravel. Removing material left the interior exposed: chimneys, volcanic bombs, layers of ash and lava flows that on other volcanoes lie beneath the grass. Today it is a visitor site, at Saint-Ours-les-Roches, about 15 minutes from Clermont-Ferrand and about 5 from exit 26 of the A89.

What the visit is like

It lasts about 2 h 30 and goes in four consecutive stages: an immersive tour of about 30 minutes, the 1 h 15 guided visit through the bottom of the quarry, a 15-minute stage on the history of the place and half an hour of attractions. The guided visit is done on foot or on a little train, which costs a bit more. In July and August there is also a night tour.

Prices and bookings

In 2026, the walking visit costs €14 per adult (€14.50 in July and August) and €11.50 for ages 4 to 12; by little train, €18 and €15. Under-4s enter free. They recommend booking on its website, up to three hours ahead; you cannot book by phone or email. The 2026 season ran from 10 February to 1 November.

Accessibility

It holds the Tourisme & Handicap label. It can be toured in a wheelchair, and one carriage of the train takes a chair if you book by phone, although the train stops, on gravel, are not accessible.