The Col Bas Lakes area is designated as a Sensitive Natural Area—a fragile site rich in biodiversity. Please do not stray from the marked trail (Biotope Protection Order No. 2026-048-005).
This is a rare phenomenon in Haute-Provence: the lakes have been overgrown by plants that have accumulated and partially filled them, creating a unique wetland environment. This environment prevents the complete decomposition of organic matter, which gives the lake its blackish color and allows peat to form in layers at a rate of 3 to 4 cm per century. Each layer preserves the remains of organisms that have disappeared over the centuries, allowing us to reconstruct the environments of different eras.

From Seyne-les-Alpes (9 km), take the D207 toward Montclar, then the D607 to Saint-Pons, where you follow the Col-Bas forest trail (open from May to October) to its end (designated parking area).

Alternative route: access via the chairlifts at the Montclar ski resort.

Area : Blanche Serre-Ponçon