The panoramic view of Lac de Serre-Ponçon, the beauty of the lakes and the diversity of the landscapes encountered make this hike, on the border of the Ubaye and Blanche valleys, a must-do in the Alpes de Haute-Provence.
The site of the Col Bas lakes is classified as a fragile site, rich in biodiversity. Do not leave the signposted path (arrêté de protection de biotope n°2026-048-005).
Access via the chairlifts from Montclar station, open on certain days in July and August. Get off at La Brèche to reach the Fort.
From Seyne-les-Alpes (9 km), take the D207 towards Montclar, then the D607 to Saint-Pons, where you follow the Col-Bas forest track (open from May to October).