# Visiting the inside of the Volcan de Lemptégy, on foot or by little train Guided visit · 2 h 30 · Families · From €14 (children from €11.50) Fuente: https://www.geocalia.com/en/france/auvergne-rhone-alpes/chaine-des-puys/things-to-do/lemptegy-volcano · Revisado: 2026-11-12 Dónde: Chaîne des Puys In the rest of the Chaîne des Puys you see the volcanoes from outside, covered in grass and forest. At Lemptégy you see them from inside, because a quarry took away half the mountain and left its insides exposed. ## What it is and why it is worth it Lemptégy is a volcano of the chain that was worked for decades as a pozzolana quarry, the red and black volcanic gravel used in building and gardens. As material was extracted, the conduits through which the magma rose, volcanic bombs, lava flows and ash layers from different eruptions were left exposed. Today it is a guided-visit site at Saint-Ours-les-Roches, about 15 minutes from Clermont-Ferrand and a few minutes from Vulcania. It is the natural complement to the Puy de Dôme and the Pariou: up there you see the shape of the volcanoes, here you understand how they were made. ## What the visit is like It lasts about 2 h 30 and goes in four consecutive stages. First, an immersive show of about 30 minutes. Then, the guided visit through the bottom of the quarry, 1 h 15, on foot or on a little train. Then, 15 minutes on the history of the place and, to finish, half an hour of attractions. Visits have fixed times that you see when booking. In July and August there is also an evening tour. ## Prices and booking In 2026 the visit on foot costs €14 per adult, €14.50 in July and August, and €11.50 for ages 4 to 12. By little train, €18 and €15. Children under 4 do not pay. Outside July and August there is a pass combining Lemptégy with the Grotte de la Pierre de Volvic, from €21.60 per adult. Book on its website, up to three hours before: you cannot book by phone or email. The 2026 season ran from 10 February to 1 November; the 2027 dates are not yet published. ## Getting there It is at 31 route des Puys, at Les Maisons Rouges, about 5 minutes from exit 26 of the A89. Parking is free, also for motorhomes. From April to November there is a shuttle from Clermont-Ferrand, free at weekends. ## Paso a paso ### 30 min · Immersive show The introduction, before going down into the quarry. ### 1 h 15 · Guided visit Through the bottom of the volcano, on foot or by little train, with a guide. ### 15 min · The history of the place From quarry to visitor site. ### 30 min · Attractions The last stage, designed for children and families. ## Qué llevar - Closed shoes: the ground is gravel - A jacket, there is a draught at the bottom - A cap in summer, there is little shade ## Consejos ### Book online Visits have fixed times and fill up in summer. ### With small children, the little train It saves the walk over the gravel and the visit is the same. ### Combine it with Vulcania They are a few minutes apart: Lemptégy in the morning and the park in the afternoon. ## Preguntas frecuentes ### How long does the Lemptégy visit take? About 2 h 30 in total. ### How much does it cost? In 2026, €14 per adult on foot and €18 by little train; children aged 4 to 12, €11.50 and €15. ### Do I need to book? They recommend it, on their website and up to three hours before. ### Is it open in winter? No. In 2026 it opened from 10 February to 1 November. ### Can I go in a wheelchair? Yes, the site is accessible; one train carriage takes a wheelchair if you book by phone.