Caborne du Bœuf

Caborne du Bœuf is a cave in the village of Saint-Hymetière-sur-Valouse, in the Jura department of France, and one of the more impressive natural formations in the region, reachable via an easy waymarked walk above the Valouse gorge.

Where does the name come from?

In local patois, "caborne" simply means cave. The "du Bœuf" ("of the ox") part refers to a distinctive rock formation inside the main chamber whose shape resembles the belly of an ox — the same name is used both for the cave as a whole and for that particular formation.

What will you see there?

The entrance porch is the highlight: roughly 20 metres high, it ranks among the largest cave openings in the whole Jura region. The rock overhang forming the porch measures approximately 30 metres long, 20 metres wide and 18 metres high. The first chamber beyond the entrance is lit and freely open to visitors, with no caving equipment required — a torch, or even the daylight spilling through the opening, is enough.

The full cave system runs to about 180 metres of galleries with a 22-metre vertical range. The remaining branches beyond the main chamber — around 176 metres — are accessible only to visitors equipped for speleology; narrow passages and the absence of lighting rule out casual exploration there.

One notable detail: under the same porch, on the left-hand side, is the entrance to the Grotte de l'Ermitage (Hermit's Cave), a second opening in the same rock face. Together the two form a small karst complex worth taking in as a pair.

How do you get there?

The starting point is the village of Saint-Hymetière, specifically near its church — one of the finest Romanesque churches in the Franche-Comté region, well worth a look before or after the walk. The waymarked path to the cave runs about 1.5 km one way, climbing through wooded slopes with views down into the Valouse gorge. Visitors wanting a longer outing can follow a loop combining Caborne du Bœuf with the gorges de la Valouse, roughly 6.6 km long and taking about 2.5 hours.

The terrain is moderately demanding, with some steep sections, so sturdy walking shoes are recommended. The cave's main chamber itself requires no special gear.

When is the best time to visit?

Spring through early autumn is ideal, when the path is dry and easier underfoot and the woodland around the gorge is at its most scenic. In summer, the cool interior of the cave offers welcome relief from the heat on the trail, adding an extra reason to make the trip.

Frequently asked questions

Can you enter the cave without caving equipment? Yes — the first, main chamber beyond the porch is lit and open to all visitors. The deeper sections (about 176 metres of passages) require proper speleology gear.

How long does it take to reach the cave? The stretch from Saint-Hymetière to the cave is about 1.5 km one way. The full loop through the gorges de la Valouse takes roughly 2.5 hours.

Is it worth combining with other sights? Yes — right next to it, under the same porch, is the entrance to the Grotte de l'Ermitage, and the village of Saint-Hymetière itself has one of the region's most notable Romanesque churches.

Is the trail suitable for children? The path is moderately demanding, with some steep stretches but no climbing involved. Families with active children should manage comfortably, taking care near the edges of the gorge.