Walking Day - Lago di Posta Fibreno Nature Reserve

Walking to discover the Lago di Posta Fibreno

The Walking Day is the autumn highlight of the Lago di Posta Fibreno Regional Nature Reserve, located in the municipality of Posta Fibreno, in the province of Frosinone, in the heart of the Ciociaria area and the Lazio region. Every year, on the second Sunday of October, the reserve participates in the National Walking Day promoted by FederTrek, a widespread event that invites associations, schools, parks, and municipalities across Italy to rediscover the territory at a slow pace.

A unique karst lake in Italy

The Lago di Posta Fibreno is no ordinary basin: it is a karst lake fed by underground springs that flow at a constant temperature throughout the year, a phenomenon that has allowed relict species from the glacial era to survive. Its most famous attraction is the Rota, the floating island already mentioned by Pliny the Elder: a natural raft of peat and vegetation that moves slowly across the water's surface. The protected area, established by the Lazio Region, safeguards a mosaic of wetlands, flooded meadows, reed beds, and riparian forests of great naturalistic value.

The route

The excursion follows a loop of approximately 9-10 kilometers, with a moderate elevation gain (around 200-250 meters) and a tourist-hiking difficulty level suitable for anyone with a basic level of fitness. The trail typically includes:

• the Reserve headquarters in Contrada Carpello, the starting and finishing point;
• the historic center of Posta Fibreno with its museum;
• the old water mill, a testament to the valley's rural economy;
• the springs and the shores of the lake, with viewpoints overlooking the floating island;
• the trails within the protected area, amidst wet meadows and riparian vegetation.

Along the way, park rangers and AIGAE environmental hiking guides offer stops to delve into geology, karst phenomena, birdlife, and flora, turning the walk into a true open-air lesson.

A collective walk

The Walking Day in Posta Fibreno is traditionally a choral event: recent editions have seen the participation of the CAI of Gallinaro, ASI, Legambiente of Sessa Aurunca, the Nordic Walking ASD of Frosinone, and the ASD Albalonga, bringing several hundred participants to the reserve. The event concludes with a social gathering that has become an integral part of the day, an opportunity to exchange impressions and taste local products.

Why participate

October is perhaps the best month to visit the Fibreno valley: the raking light, the colors of the forest, and the lower tourist turnout reveal the protected area in its most authentic dimension. The initiative is free and designed for families, groups, and casual walkers, representing a simple way to connect with a natural heritage that many visitors to Lazio have yet to discover.