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Roussillon and Aude · about 10 km from Saint-Paul-de-Fenouillet

Résurgence du Bosc

  • Max depth24 m
  • CertificationFull cave
  • SpecialSidemount
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Diving and fills

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Fills nearby

  • Fill stationCAP Port-Vendres (Centre d'Activité Plongée)~90 min drive (estimate)Air, nitrox 32/40/50, oxygen, trimix; up to 300 bar (surcharge above 230 bar); CCR fill packageRoute ↗
  • Fill stationCAP Port-Vendres (Centre d'Activité Plongée)~90 min drive (estimate)Air, nitrox 32/40/50, oxygen, trimix and CCR fills up to 300 bar (surcharge above 230 bar); custom blends too (O₂ and helium per m³)Route ↗
  • Fill stationPlongée Bleue (Banyuls-sur-Mer)~96 min drive (estimate)Air, nitrox (membrane) and oxygen (B50 cylinders, booster for CCR) up to 300 bar; trimix not listed — askRoute ↗
All fill stations and places to stay ↓

The dive

An active underground river in the Corbières. Between S1 and S2 are large galleries (4 x 6 m) with fallen slabs; then a fissure 10 m long and 1 m wide leads to S3.

Eleven sumps with dry sections in between: long, heavy trips with lots of carrying; beyond S8 it gets tight (0.5 x 1.8 m).
Source: plongeesout (FFS), Résurgence du Bosc ↗
Profile and sections

An active underground river in the Corbières. Between S1 and S2 are large galleries (4 x 6 m) with fallen slabs; then a fissure 10 m long and 1 m wide leads to S3. After S3 comes a 217 m meander, and between S8 and S9 a comfortable 50 m gallery with a wet roof. S11bis is an overflow with murky, yellowish water and heavy clay. Visibility, temperature and flood behaviour are not published.

The river was explored in 2002–2005 by a small team, with 14 cylinders for the whole team.

Depth and profile
S1 70 m / -14 · S2 40 m / -2 · S3 250 m / -24 · S4 20 m / -2 · S5 285 m / -14 · S6 92 m / -19 · S7 88 m / -12 · S8 14 m / -1.5 · S9 38 m / -3 · S10 10 m / -3 · S11 impassable; 1,614 m of passage, 930 m of it underwater (2005)
Configuration
Sidemount with small cylinders. S1–S5 are roomy (2–6 m wide, sandy floor); from S8 on it is tight (1–1.5 m, one passage 0.5 x 1.8 m). Backmount only makes sense up to S2 (estimate).
DPV: DPV possible (estimate)
S3 (250 m) and S5 (285 m) are roomy enough, but the scooter has to be carried over dry sections; little gain (estimate).
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 24 m (trimix or deco may be needed) · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Dry sections / haulingExperienced 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.

Cave map

How to get there

From the D14 take the D804 towards Montgaillard through Rouffiac. 2 km after crossing the Verdouble, turn right onto a track down to the river. Walk ~100 m downstream: the spring is on the left bank by a large boulder; an air entrance lies 5 m higher. Everything is carried between the sumps.

Plan your route ↗

Around Résurgence du Bosc

Fills3 fill stations · nearest 60 km

  • CAP Port-Vendres (Centre d'Activité Plongée)

    ~90 min drive (estimate)

    Anse Gerbal (ancienne criée), 66660 Port-Vendres

    Air, nitrox 32/40/50, oxygen, trimix; up to 300 bar (surcharge above 230 bar); CCR fill package

    Not listed — ask

    Dive centre at Port-Vendres harbour (Côte Vermeille); also fills walk-in customers' cylinders. Far from Ganges (~2 h 45, estimate). Sofnolime: ask.

    Website ↗Navigate ↗

  • CAP Port-Vendres (Centre d'Activité Plongée)

    ~90 min drive (estimate)

    Anse Gerbal (ancienne criée), 66660 Port-Vendres

    Air, nitrox 32/40/50, oxygen, trimix and CCR fills up to 300 bar (surcharge above 230 bar); custom blends too (O₂ and helium per m³)

    Not listed — ask

    Dive centre at Port-Vendres harbour (Côte Vermeille). Also fills cylinders for visitors who do not dive with the centre; CCR fill package for 1.5–3 l cylinders. Website prices include helium €90/m³ and O₂ €40/m³. ~1 h 20 from Saint-Paul-de-Fenouillet and ~35 min from Perpignan (estimates). Sorb (sofnolime): ask.

    Website ↗Navigate ↗

  • Plongée Bleue (Banyuls-sur-Mer)

    ~96 min drive (estimate)

    Port de plaisance, 10 quai George Petit, 66650 Banyuls-sur-Mer

    Air, nitrox (membrane) and oxygen (B50 cylinders, booster for CCR) up to 300 bar; trimix not listed — ask

    Not listed — ask

    Dive centre with two compressors (58 m³/h) and eight 80 l buffer tanks; runs rebreather courses. Whether walk-in fills for visitors are possible is not stated on the site — ask. ~1 h 30 from Saint-Paul-de-Fenouillet (estimate).

    Website ↗Navigate ↗
Where to sleepAround Saint-Paul-de-Fenouillet on Booking.com ↗

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Caves nearby6 within 32 km

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Sources, sharing and disclaimer

Sources

Current conditions

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

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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 (the FFS plongeesout.ffspeleo.fr site pages per département and accident list, FFESSM Occitanie Pyrénées Méditerranée reports 2011–2026, Wikipedia, Grottomap, Made in Perpignan, Francis Le Guen's blog, club reports by the Entente Spéléologique du Roussillon and Les Trogloxènes, Agence de l'eau Rhône-Méditerranée, Côte Indigo, Spéléo Secours Français, Medsubhyp, sante.fr and dive-centre websites; Sept 2026). Pins from plongeesout (GPS, checked against converted Lambert coordinates) and Grottomap; ~ = estimate (drive times too). Most site data are old (1970–2008). Rules change — check locally.