Trou de Saint-Pons

Trou de Saint-Pons is a small karst cave above the village of Valbelle, in the Alpes-de-Haute-Provence, carved into Jurassic limestone on the northern flank of the Montagne de Lure. Roughly 37 metres long, it opens right above the gorge known as the Pas des Portes, next to the hermitage chapel of Saint-Pons, tucked beneath tall ochre rock overhangs.

How do you get there?

The site sits barely 2 km from Valbelle as the crow flies, yet reaching it takes about 45 minutes on foot, climbing some 400 metres of elevation on a path that turns steep near the top. The old, long-forgotten trail up to the hermitage was cleared and rebuilt in 1967 by youth work camps organised at the initiative of speleologist Pierre Martel, and it has been maintained ever since as one of the classic walking loops on the Montagne de Lure. From the chapel, only a short final climb separates you from the cave entrance itself.

What will you see?

Inside is a genuine karst passage - a narrow gallery cut through a rocky spur, its walls lined with smooth erosion pockets carved by water over millennia. Those hollows are the source of the local legend: Saint Pons, harried by a flock of magpies pecking at him and shrieking over his head, is said to have burrowed into the rock to escape them, travelling more than a league underground before emerging near the Pas des Portes gorge. Villagers still point to the rounded marks in the ceiling and side walls as the imprint of his head and shoulders. The crawlable stretch of the cave is only about 20 metres long and leads to a small ledge, from which you loop back to the chapel.

The cave was first recorded in 1841 by Abbé Féraud in his description of the department, and on 1 October 1966 it was visited by Pierre Martel himself, a key figure in the region's speleology and mountain ethnography. Local tradition also held that anyone who crawled through the passage would be spared colic for the whole following year - villagers from Valbelle once processed here together to squeeze through the narrow tunnel one by one.

When should you visit?

Spring and autumn are the best seasons, when temperatures on the slopes of Lure stay mild and the approach trail avoids the summer heat typical of this part of Provence. In summer, start early and carry plenty of water - the path has no shade and no water points along the way. In winter, ice on the steeper sections can make the final approach tricky, so it is worth checking conditions beforehand. Because the passage is tight, the cave does not suit anyone uneasy with confined spaces or carrying a large pack - leave your bag at the entrance before crawling through.

Frequently asked questions

Do you need caving gear to enter the Trou de Saint-Pons? No - it is a short, roughly 20-metre stretch that you cover by crawling or stooping, with no rope or helmet required. Sturdy shoes and a torch are enough.

How long is the walk up from Valbelle? About 45 minutes one way, climbing around 400 metres; the last section is steep and needs care.

Where does the legend of Saint Pons come from? From the shape of the passage walls - the smooth erosion pockets reminded locals of the imprint of a head and shoulders, feeding the story of a saint who fled through the rock to escape attacking magpies.

Is there anything else to see nearby? Yes - right next to the cave stands the hermitage chapel of Saint-Pons, set beneath rock overhangs, along with a view over the Pas des Portes gorge where legend says the saint emerged from underground.