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Ardèche · about 7 km from Ruoms

Aven du Ranc du Bœuf

  • CertificationFull cave
  • Water temperature≈ 12–13 °Cestimated, no reports yet
  • SpecialSidemount

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The dive

This is the third entrance of the Bourbouillet–Reméjadou–Ranc du Bœuf system; according to the guide, reaching the most remote sumps takes a lot of effort.

Organic material decomposes in the shaft: the air holds more CO₂. Take care while descending and waiting.
Profile and sections

This is the third entrance of the Bourbouillet–Reméjadou–Ranc du Bœuf system; according to the guide, reaching the most remote sumps takes a lot of effort. A detailed description is in Baudu & Philippe, Spelunca 84 (2001), pp. 33-41 (not online).

Practical: plan this dive with the survey or with local information (CDS 07).

Depth and profile
About 5 m down into a small chamber, then a narrow ~15 m shaft that ends straight in the sump: you rappel into the water. Gives access to the most remote sumps of the Reméjadou system (survey with the Reméjadou). Its upstream part connects in two places with the part upstream of S7 of the Espeluches. Depth not stated.
Configuration
Narrow shaft straight into the water and the tight, clay-filled sumps of the Reméjadou: sidemount or a small configuration (estimate).
DPV: Not DPV-suitable (estimate)
A narrow shaft that ends straight in the water, then the tight, clay-filled sumps of the Reméjadou system: no scooter.
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveRopework (SRT) needed
  • Whole caveExperienced divers only · doesn't decide who may dive
RopeworkExperienced diversDepends on water level or swell

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

How to get there

From Saint-Alban-sous-Sampzon take the D208 towards Chandolas, after 2 km the D246 towards Joyeuse. Past two bridges, up onto the plateau; on the left a property with a low stone wall and a square house, then an unpaved parking area on the left (44°26.495'N 4°15.304'E). A hiking trail starts opposite: follow it 60 m, then take the path on the right behind an old wooden barrier, 30 m to a clearing. At its end a narrow path goes into the bushes (an old pot lid hangs from a tree), 120 m downhill. The small entrance is on the left, fenced with wire.

Plan your route ↗

Around Aven du Ranc du Bœuf

FillsNo fill station known nearby
Where to sleepAround Ruoms on Booking.com ↗

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Other sites6 within 7 km

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Sources, sharing and disclaimer

Current conditions

Visibility, flow and water levels change quickly. Right before your dive, check what other divers report:

  • Ardèche Caves Conditions ↗
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    Current conditions in the Ardèche caves: visibility, flow, water level, state of the line and temperature.

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Sept 2026) and the guide (2024 edition): CDS 07 and CDS 30, plongeesout.ffspeleo.fr, Spelunca, Grottocenter, foussoubie.fr, club reports and news. Page numbers refer to Stefan Schiemann's Cave Diving Guide Ardèche, Gard & Vaucluse. Map pins come from the GPS coordinates in the guide, from Grottocenter/OpenStreetMap or were converted from Lambert grid references (may be 50–100 m off). For some caves the data is thin or old: check it in the guide and locally. Certification requirements are estimates. Drive times are calculated by road for each stay (OSRM, OpenStreetMap).