Lac de Servière

Lac de Servière sits at roughly 1,200 metres above sea level on the territory of Orcival, right on the border with neighbouring Vernines, in the Puy-de-Dôme department of France's Auvergne region. Tucked into the Monts Dore range within the Auvergne Volcanoes Regional Nature Park, it is one of the more striking reminders that this landscape was shaped by fire long before it became a hiking destination.

Why does this lake exist at all?

Lac de Servière occupies a maar, a type of crater produced by a phreatomagmatic explosion. Rising magma met groundwater underground, and the sudden conversion of that water into steam blew out a crater rather than producing a typical lava cone. Over time, the depression filled naturally with water, leaving the lake seen today. It now covers about 15.5 hectares and reaches a depth of around 26 metres, making it a sizeable example of a maar lake for this part of the Massif Central.

What makes the surrounding nature notable?

A peat bog rings the water, hosting aquatic and marsh plant species that are rare and formally protected at a national level. This combination of volcanic origin, intact peatland and sensitive vegetation earned the site recognition as an Espace Naturel Sensible, a designated environmentally sensitive area. Swimming and open fires are both prohibited around the lake, a restriction aimed squarely at preserving that fragile balance rather than limiting visitors for its own sake.

What hiking options are there?

The easiest way to experience the lake is the loop path circling it directly: about 2 kilometres, roughly 40 minutes on foot, and gentle enough for families or a picnic stop by the water. Visitors after something longer can pick up a stretch of the GR30 long-distance trail, which continues toward Puy de l'Ouire. Along that stretch, the route opens onto views of the distinctive Roches Tuilière and Sanadoire rock formations, and on clear days walkers can pick out the Chaîne des Puys and the Sancy massif in the distance. That makes the lake a natural starting point for a fuller day of walking across Auvergne's volcanic plateau rather than just a short detour.

Why is Orcival itself worth pairing with a visit?

The commune that gives the lake its administrative home is best known for the Basilica of Notre-Dame d'Orcival, a Romanesque church that has functioned as a Marian pilgrimage site for centuries. Combining a stop at the lake with time in the village itself is an easy way to see two very different sides of this corner of Puy-de-Dôme in a single outing: raw volcanic scenery on one hand, centuries-old religious architecture at the heart of the village on the other.

Frequently asked questions

Can you swim in Lac de Servière? No. Swimming is banned to protect the surrounding peat bog and its protected plant life.

How long does it take to walk around the lake? The loop trail is about 2 kilometres and takes roughly 40 minutes, an easy option for families.

Is the lake really of volcanic origin? Yes — it fills a maar, a crater formed when rising magma hit groundwater and triggered a steam explosion, which later filled with water.

How far is the lake from the village of Orcival and its basilica? The lake lies within Orcival's own commune, so the village and its Romanesque basilica are only a short drive away.

Can the lake be used as a starting point for a longer hike? Yes. A section of the GR30 trail continues from the lake toward Puy de l'Ouire, passing views of Roches Tuilière, Sanadoire and the Chaîne des Puys.