The best traffic-free bike rides around Portiragnes

Here, the landscape tells the story of the sea, the river, and human history. Formerly a space for salt pans and then cultivation, the Bagnas became a nature reserve in 1983. Between ponds, reeds, and salt marshes, this vast wetland between Agde and Marseillan is today one of the major refuges for migratory birds on the Mediterranean coast.

It is difficult to imagine that waterways cross here like at a crossroads. Built in 1676 by engineer Pierre-Paul Riquet, the round lock of Agde is unique on the Canal du Midi: its circular shape and its three gates allow boats to choose between three different directions. Depending on their course, they head back towards Béziers, towards Agde, or towards the Étang de Thau. An ingenious river junction at the entrance to the town.

The single lock of Portiragnes opens onto the Agde reach downstream. This is a typical area of the landscapes of the Languedoc coastal strip. Indeed, from this lock onwards, the canal surface is at an altitude of only 1 meter above sea level. It runs alongside wetlands of former salt ponds (la grande Maïre), where a rich fauna and flora are found (bulls, horses, waders, amphibians, reeds...) and some pine groves. These places are conducive to the establishment of numerous campsites.

The single lock of Portiragnes opens onto the Agde reach downstream. It is a typical area of the landscapes of the Languedoc coastal strip. Indeed, from this lock, the surface of the canal is at an altitude of only 1 meter above sea level. It runs alongside wetlands of former salt ponds (la grande Maïre), where we find rich fauna and flora (bulls, horses, waders, amphibians, reeds...) and some pine groves. These places are conducive to the establishment of numerous campsites.

The Bagnas lock is the last single-chamber lock on the Canal du Midi before Sète, at the end of the canal. Built around 1676, it is located 235.2 km from Toulouse at an altitude of 2 m, between the Étang de Thau to the east and the Hérault river then the Prades lock to the west. It is located in the commune of Agde in the Hérault department in the Occitanie region.

The Bagnas lock is the last single-chamber lock on the Canal du Midi before Sète at the end of the canal. Built around 1676, it is located 235.2 km from Toulouse at an altitude of 2 m, between the Étang de Thau to the east and the Hérault river then the Prades lock to the west. It is located in the commune of Agde in the Hérault department in the Occitanie region.

The round lock of Agde is the most original on the canal. Built in 1675-1676. It was put into operation in 1678 when the canal from Béziers to the Étang de Thau was opened to navigation. A particular situation, an original response: it was decided to build a round lock with three gates. The first opens towards the city of Sète and the Étang de Thau via a short passage on the Hérault; the second opens onto the canal coming from Béziers; the third opens onto the small canal which allows small boats to reach the city of Agde and its maritime port and then Grau d'Agde. The round lock was commissioned in 1678 when navigation opened between the Étang de Thau and Béziers. It originally measured 30 meters in diameter with a depth of 5.20 meters in the center. Thanks to this round lock and the low canal, small maritime boats can come onto the canal!

A detour to La Tamarissiere-Grau d'Agde is worthwhile