Lac Chambon is a volcanic lake formed by lava flows from the Massif du Sancy that dammed the Couze Chambon river approximately 8,000 years ago. Lying at 877 metres altitude near the village of Murol in the Puy-de-Dôme department, it is one of the largest and most accessible of the Auvergne's volcanic lakes, set within the Parc Naturel Régional des Volcans d'Auvergne, 35 kilometres south of Clermont-Ferrand. The landscape context is dramatic: the Château de Murol perches on a volcanic dome above the village, and the Puy de Sancy — the highest summit in the Massif Central at 1,885 metres — forms the southern horizon. The beach sits on the lake's north-eastern shore and is a mix of dark volcanic sand (coarser and more granular than sea sand), grass, and gravel. The lake is relatively shallow for its size, with a maximum depth of around 4 metres, which allows it to warm quickly in summer: water temperatures typically reach 18–22°C in July and August, making it one of the warmer swimming lakes in the Auvergne region. The water has a deep blue-green hue, reflecting the basalt volcanic geology rather than the limestone-derived turquoise of the Alps. A supervised swimming zone operates throughout July and August with lifeguards on duty. Pedalo and canoe hire is available from the beach, and a camping ground adjacent to the lake provides accommodation for longer stays within the volcanic natural park. A snack bar and picnic areas serve day visitors. The proximity of Murol village — with its medieval castle, local restaurants, and artisan food producers — makes the lake beach a natural anchor for an Auvergne touring itinerary. By car from Clermont-Ferrand the drive via D996 takes approximately 45 minutes. A seasonal bus service from Clermont-Ferrand operates in summer; visitors should confirm the current schedule with Transdev Auvergne before travel.
Amenities
- Supervised swimming area (July–August)
- Lifeguards July–August
- Pedalo and canoe hire
- Snack bar
- Picnic areas
- Toilets and changing facilities
- Camping adjacent to lake
Good to know
- Best for
- families, swimmers, photographers, couples, wildlife-watchers
Location
Plage du Lac Chambon, 63790 Murol
45.5690, 2.9312 View on map
Highlights
- Swimming in a volcanic lake formed by ancient Massif du Sancy lava flows — unique geology in the Massif Central
- One of the Auvergne's warmest natural lakes — water reaches 18–22°C by mid-July
- Château de Murol — a well-preserved medieval fortress on a volcanic dome — overlooks the lake
- Pedalo and canoe hire with the Puy de Sancy massif as the southern backdrop
- Adjacent camping ground within the Parc Naturel Régional des Volcans d'Auvergne
Tips for visiting
- Water temperatures peak in late July and early August; early June can still be cool at 877 metres altitude.
- The Château de Murol is open in summer and is a worthwhile half-day companion to a lakeside visit.
- The camping ground adjacent to the lake fills rapidly in the last two weeks of July; advance booking is strongly advisable.
- Morning light on the Puy de Sancy reflected in the lake makes for excellent landscape photography from the beach.
- The seasonal bus from Clermont-Ferrand is not always reliable; confirm the current schedule with Transdev Auvergne well in advance.
When to visit
Late June through August is warmest for swimming; July and August bring peak crowds but also full amenities including lifeguards, pedalo hire, and the snack bar.
Frequently asked questions
Why is Lac Chambon described as a volcanic lake?
The lake was formed approximately 8,000 years ago when lava flows from the Massif du Sancy volcanic complex dammed the Couze Chambon valley. It lies within the Parc Naturel Régional des Volcans d'Auvergne and the basalt geology gives the water its distinctive dark blue-green colour.
Is the water warm enough for comfortable swimming?
In July and August water temperatures typically reach 18–22°C, which is comfortable for most swimmers. The relatively shallow lake (maximum around 4 metres) warms faster than deeper alpine lakes further east.
How far is Lac Chambon from Clermont-Ferrand?
The lake is approximately 35 kilometres south of Clermont-Ferrand; the drive via D996 takes around 45 minutes. A seasonal bus service also operates in summer, subject to annual scheduling by Transdev Auvergne.
Are there accommodation options at the lake?
A camping ground sits directly adjacent to the lake shore and is one of the most popular camping destinations in the Parc des Volcans d'Auvergne. The village of Murol also has gîtes and small hotels.
What other activities are available near Lac Chambon?
The Château de Murol, one of the best-preserved medieval fortresses in the Auvergne, is open to visitors in summer. The surrounding area offers hiking in the Massif du Sancy and cycling through the volcanic plateau.