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Hautes-Alpes

Lac de Serre-Ponçon: beaches, activities and sunken villages

Published on 23 October 2026 · 4 min read
Théo By Théo
Lac de Serre-Ponçon: beaches, activities and sunken villages

Key takeaways

Lac de Serre-Ponçon, between Gap and Embrun, is a reservoir of about 2,800 hectares and 1.2 billion cubic metres, created on the Durance between 1959 and 1961, which flooded the villages of Savines and Ubaye. Many beaches are open for swimming, several of them lifeguarded in summer, and visitors can enjoy sailing, paddleboarding and hiking around the famous Saint-Michel chapel.

With its turquoise waters framed by alpine peaks, Lac de Serre-Ponçon is one of the most beautiful lakes in France and one of the largest man-made reservoirs in Europe. It was created in the early 1960s with the construction of a dam on the Durance river and has become, in a few decades, the leading water sports destination in the Hautes-Alpes.

Beaches, activities, the history of the sunken villages, viewpoints and lakeside campsites: here is our guide to making the most of Lac de Serre-Ponçon.

Lac de Serre-Ponçon at a glance

Information At a glance
Where? Hautes-Alpes and Alpes-de-Haute-Provence, between Gap and Embrun
Size About 2,800 hectares and 1.2 billion cubic metres of water
Origin Dam on the Durance river, filled between 1959 and 1961
Landmark The Saint-Michel chapel, on its islet in the Baie Saint-Michel
Activities Swimming, sailing, paddleboarding, canoeing, water skiing, hiking
Best time to visit June to September, with the warmest water in July and August

A lake born from a dam

The Serre-Ponçon dam was built at the end of the 1950s to regulate the Durance, generate electricity and irrigate Provence. Filling began at the end of 1959 and was completed in 1961. With about 2,800 hectares and 1.2 billion cubic metres of water, Serre-Ponçon is one of the largest man-made reservoirs in Western Europe.

The lake is shaped like a large “V”, with one arm towards Embrun to the north and another towards the Ubaye valley to the east. Its indented shores form many bays and coves, and the roads overlooking it offer spectacular views.

The sunken villages

The creation of the lake flooded several villages in the valley, including Savines and Ubaye. The residents of Savines were rehoused in a village rebuilt higher up, Savines-le-Lac, with a modern church overlooking the lake. During years of severe drought or when the dam is drained, remains sometimes reappear on the shores.

In Rousset, the Muséoscope du lac tells the story of the dam’s construction and the vanished villages. To discover other lakes hiding a village, see our selection of submerged villages of France.

The Saint-Michel chapel, the image of the lake

In the Baie Saint-Michel, a small Romanesque chapel stands on a rocky islet. Depending on the water level, it seems to float on the lake or is connected to the shore. It is the most photographed view of Serre-Ponçon, to admire from the viewpoints along the Route de Chorges or up close, by paddleboard or canoe.

Where to swim in Lac de Serre-Ponçon?

The lake has many developed beaches, around Savines-le-Lac, Chorges and the Baie Saint-Michel, at Prunières or on the lake area of Embrun. Several are lifeguarded in July and August. The water, glacier-cold in spring, reaches pleasant temperatures in the heart of summer. As in any mountain lake, the depth increases quickly: stay within the marked areas.

What to do at Lac de Serre-Ponçon?

  • sailing, windsurfing and water skiing, with the lake’s watersports centres;
  • paddleboarding and canoeing, to reach the Saint-Michel chapel and the coves;
  • boat trips and boat hire, from the main centres;
  • hiking and mountain biking on the trails above the lake, and paragliding over its waters;
  • visiting the dam and the Muséoscope, to understand the lake’s story.

Where to camp by Lac de Serre-Ponçon?

The lake shores have many campsites, often right on the water. In Chorges, around the Baie Saint-Michel, the Camping de la Baie de la Chapelle has a direct view of the famous chapel. In Prunières, the Camping Le Nautic is ideal for watersports, and on the Ubaye side, the Camping La Palatrière, in Le Sauze-du-Lac, is a quieter base.

You will find all the addresses on our page about campsites on the shores of Lac de Serre-Ponçon.

Our verdict

Serre-Ponçon has all the makings of a small summer paradise: turquoise water, mountains all around, activities for everyone and exceptional sunshine for the Alps. Come in June or September for peace and quiet, in July and August for the warmest water, and book your lakeside pitch early.

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Théo
Théo
Product Manager Aimer Camper, spécialiste SEO HPA

Théo Mercier-Balaz pilote les portails camping du réseau Aimer Camper depuis plus de dix ans, au contact quotidien des campings partenaires.

frequently asked questions

Frequently asked questions about Lac de Serre-Ponçon

Where can you swim in Lac de Serre-Ponçon?
On the developed beaches around Savines-le-Lac, Chorges and the Baie Saint-Michel, at Prunières and on the Embrun lake area. Several are lifeguarded in July and August.
Which villages were flooded by Lac de Serre-Ponçon?
Mainly Savines, rebuilt higher up as Savines-le-Lac, and Ubaye. The Muséoscope du lac, in Rousset, tells their story.
How big is Lac de Serre-Ponçon?
About 2,800 hectares for 1.2 billion cubic metres of water, one of the largest man-made reservoirs in Western Europe.
Where can you see the Saint-Michel chapel?
In the Baie Saint-Michel, near Chorges and Prunières, from the roadside viewpoints or up close by paddleboard or canoe.
When can you swim in Lac de Serre-Ponçon?
From June to September. The water is most pleasant in July and August; in spring it stays cold.
Where can you camp by Lac de Serre-Ponçon?
In Chorges, Prunières, Savines-le-Lac, Embrun or Le Sauze-du-Lac, where many campsites are right on the water.
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