Lac de Barbazan

Lac de Barbazan is a small lake in the commune of Barbazan, in the Haute-Garonne department of southern France, set at the foot of the Pyrenees. Sitting at roughly 450 metres above sea level, it is something of a geological curiosity: it is classified as a glacial lake, a type of formation rarely found at such a moderate altitude in this part of France. The water's colour shifts through the day with the light, and the lake is framed by the gentle green hills of the Comminges area.

How did the lake form?

Local tradition ties the lake's origin to a legend involving Saint Peter and Jesus, said to have travelled through the area disguised as poor wayfarers. The villagers turned them away empty-handed, and only one modest household offered them hospitality. According to the story, this rejection brought divine punishment: the ground gave way and water swallowed the village, leaving the lake in its place. Guides in the area still tell the tale, even though the scientific explanation points to glacial processes dating back thousands of years.

What can visitors do at the lake?

Lac de Barbazan is mainly a spot for family walks and quiet outdoor time. A path runs around the water, and the area is dog-friendly. Swimming is not allowed here, so visitors looking to bathe should head to the supervised lake beach at Montréjeau, about 7 kilometres away.

The lake is, however, a well-regarded fishing spot. Anglers need a valid fishing permit, and the lake falls under first-category fishing regulations. The season generally runs from mid-March to late September, with short closures around scheduled restocking dates. Fishing is done from the bank only — boats and pontoon fishing are not permitted.

Barbazan, a historic spa town

Barbazan itself has long been known as a spa town. Local springs, rich in sulphate, calcium and magnesium, fed a thermal establishment that took its current form in the early 20th century under Louis Daumas, who had owned the spa since 1901. The waters were used to treat urinary, liver and intestinal ailments.

The resort reached its peak between the two world wars, when it became a favoured retreat for French colonial officials by the late 1920s, drawn by both the climate and the cure. The thermal park, covering nearly three hectares, still keeps its three avenues lined with plane trees, a visible trace of the town's spa-era prosperity. Thermal activity declined over the following decades, and the spa finally closed in the late 1990s. The lake, bordering the old spa park, remains one of the most recognisable features of the Barbazan landscape today.

FAQ

Can you swim in Lac de Barbazan? No, swimming is prohibited. The nearest supervised swimming spot is the lake beach at Montréjeau, about 7 kilometres away.

Is fishing allowed? Yes, with a valid fishing licence. The lake is managed under first-category fishing rules, and the season generally runs from mid-March to late September.

How did the lake form? It is of glacial origin, unusual for a lake at only about 450 metres altitude. Local legend instead tells of a village punished and submerged after turning away two disguised holy travellers.

Can I walk around the lake with a dog? Yes, the path around the lake is open to walkers and dogs are welcome.

What is the connection between the lake and Barbazan's thermal baths? The lake sits next to the former spa park of Barbazan, a town known for its thermal establishment that operated from the early 1900s until its closure in the late 1990s.