The dam, completed in 1672, was the largest earthwork dam in the world at the time of its construction.
The reservoir is fed by water collected from the Laudot and Lampy rivers, diverted via complex masonry channels.
It was designated as a UNESCO World Heritage site as part of the broader Canal du Midi network.
The site contains a 'water wall' structure, the Voute de la Rigole, that demonstrates the advanced civil engineering of the era.
The reservoir's water level is manually managed to regulate the flow of the canal during dry seasons.
Bassin de Saint-Ferréol is a historic 17th-century reservoir engineered by Pierre-Paul Riquet to supply the Canal du Midi. Located at the edge of the Montagne Noire, the lake functions as the primary water source for the canal system's summit level. It is a man-made body of water spanning approximately 67 hectares. The site serves as a regional recreational hub featuring designated swimming areas, hiking trails, and picnic zones. The surrounding parkland includes a variety of mature trees and landscaped sections that provide shade. The reservoir is held by a massive earth dam, which was considered an engineering marvel at the time of its construction. Visitors can explore the adjacent Canal du Midi museum to learn about the site's hydraulic history.
The top of the main dam wall provides a panoramic view of the entire lake and the surrounding forest.
Bring water shoes, as the lake bed can be rocky near the shore.
Visit the 'Musée du Canal du Midi' located nearby to understand the site's engineering context.
The shaded areas on the north side are less crowded during peak weekend hours.
Attempting to swim near the dam infrastructure or outside of the marked safety buoys.
Swimming areas are supervised only during the summer months; otherwise, the site is open year-round for hiking.
Swimming is restricted to designated, lifeguard-supervised zones during the summer season.
