Tourbière De La Jasse De Martinou

Tourbière de la Jasse de Martinou is a small but ecologically significant peatland reserve in the commune of Lacaune, in the Tarn department, within the Haut-Languedoc Regional Nature Park. The site sits in the Monts de Lacaune range, on the fringes of the Massif Central, amid rolling terrain covered by forests and pastureland.

What does the name actually refer to?

The reserve protects a cluster of what locals call "sagnes" — a term used across the Monts de Lacaune for wet upland environments that combine peat bogs, damp meadows and heathland. These habitats developed largely as a result of very old pastoral farming practices, which for centuries kept the landscape open and waterlogged rather than letting it revert to closed forest.

How was the reserve established?

The Réserve biologique dirigée (RBD) of the Jasse de Martinou peatland was created in 1991. It was set up together with a second, neighboring reserve, Piquotalen, as one of two small RBDs established to protect peatland habitats in the Monts de Lacaune. Both reserves are managed as part of the state forest estate, with the goal of preserving peatland ecosystems that have become increasingly rare in France due to drainage and changes in agricultural land use.

Why is this particular site protected?

The reserve covers 15.9 hectares. Despite its modest size, its ecological value comes from the specific nature of mountain peatlands: environments that accumulate organic matter very slowly and provide refuge for plants and animals adapted to permanently wet, nutrient-poor conditions. The "Sagne de la Jasse de Martinou" area is listed as a ZNIEFF type 1 site, and it also falls within the larger ZNIEFF type 2 zone "Forêts des Monts de Lacaune," underlining its importance within the broader forest-and-peatland complex of the region.

Can visitors hike through the area?

Yes — hiking trails within the Haut-Languedoc Regional Nature Park pass close to the reserve. One well-known route runs from Col de Picotalen to Jasse de Martinou, passing near the Martinou mountain refuge and skirting the edges of the biological reserve. The trail offers views of the sagne landscape, though the protected core itself has restricted access, with visitors kept to marked paths so as not to disturb the fragile peatland structure.

Frequently asked questions

Where exactly is the reserve located? In the commune of Lacaune, Tarn department, Occitanie region, within the Monts de Lacaune range at the edge of the Massif Central.

When was the reserve created? In 1991, alongside the neighboring Piquotalen reserve.

How large is the protected area? 15.9 hectares.

What is a "sagne"? A local Occitan term for wet mountain habitats — peat bogs, damp meadows and heathland — largely shaped by centuries of pastoral farming in the Monts de Lacaune.

Is the reserve open to tourists? Nearby hiking trails, including the route from Col de Picotalen, pass close to the reserve and the Martinou refuge, but the protected core itself has limited access due to its conservation status.