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Source du Cunhac (Ressel II)

Lot · about 6 km from Cajarc

Source du Cunhac (Ressel II)

  • Max depth47 m
  • CertificationFull cave

Diving and fills

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Fills nearby

  • Lot Filling Station (Proteushop)~35 min drive (estimate)Air, nitrox (any %), trimix (incl. 21/35, 18/45, 15/55, 10/70 and custom), O₂ 200/300 bar
  • The Cave To Be~75 min drive (estimate)Air, nitrox and trimix up to 320 bar (standard 21/35, 18/45, 15/55, 10/50), O₂ up to 220 bar
All fill stations and places to stay ↓

What it looks like

All 4 videos and posts

Videos and posts

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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.

The dive

The Source du Cunhac is a sump entrance in the bed of the Lot at Saujac, opposite Cajarc, and not the Émergence du Ressel on the Célé, about 14 km away.

The Lot here is regulated by the EDF dam at Sarrans: water can be released at any time, especially when rain is forecast, and a calm river can then turn dangerous. You have to swim across the river to reach the entrance.
Profile and sections

The Source du Cunhac is a sump entrance in the bed of the Lot at Saujac, opposite Cajarc, and not the Émergence du Ressel on the Célé, about 14 km away. Divers call it Ressel II because its entrance looks like the Ressel's, but the likeness ends there. It lies just below the Saut de la Mounine, and the rock is dark, like in the Landenouse. A metal boat lies at 10 m. Then comes a round passage 5–6 m across at about -8 m, with current; the last section rises to -7 m, followed by a very turbid shaft and a boulder slope that closes down into tight side branches. One dive log from May 2023 gave 5 m visibility and 12 °C in the cave, and ~3 m visibility and 14 °C in the river.

The spring is named after Mr Cunhac, who showed it to Eric Lapouze-Troude in 1993. In April 1994 members of the B.R.E.N. explored the sump, first to 150 m and then to 240 m; that summer the team reached 360 m (end point at -41 m, deepest point -47 m). Dives in 2002 confirmed that the cave ends there.

Practical: there are no toilets and no compressor at the site.

Depth and profile
Deepest point -47 m, 360 m (1994); the 2016 survey gives 328 m and -45 m
Configuration
Backmount fine
DPV: DPV possible (estimate)
Large passages but short (360 m, -47 m); a scooter adds little
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 47 m (trimix or deco may be needed) · doesn't decide who may dive
Depends 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

Commune of Saujac (Aveyron), on the left bank of the Lot opposite Cajarc, just below the Saut de la Mounine. The entrance is in the riverbed at ~-11 m: you swim across the Lot, along a rope that runs from a tree to the cave entrance and spans about three quarters of the river. You park on the opposite (right) bank: through the village of Montbrun and along a field track that is passable without trouble, under the trees, with room for about 8 cars, within 100 m of the entrance.

Plan your route ↗

Around Source du Cunhac (Ressel II)

Fills2 fill stations · nearest 16 km
  • Lot Filling Station (Proteushop)

    ~35 min drive (estimate)

    180 route de la Tuilerie, 46100 Cambes

    Air, nitrox (any %), trimix (incl. 21/35, 18/45, 15/55, 10/70 and custom), O₂ 200/300 bar

    Daily 9:30–19:30, year-round

    About 20 min from the Ressel. Standard mixes ready to go; order custom blends in advance (WhatsApp). Also a dive shop (Proteushop), rental of scooters, lights and twinsets, and cave training (PSAI/TDI).

  • The Cave To Be

    ~75 min drive (estimate)

    842 rue Émile Zola (D14, Bournazel), 46500 Gramat

    Air, nitrox and trimix up to 320 bar (standard 21/35, 18/45, 15/55, 10/50), O₂ up to 220 bar

    Open year-round (except between the end-of-year holidays), daily 8:30–19:00

    Near Gramat, handy for the sites around Gramat and Padirac. Guided dives in 16 caves of the Lot, at your own certification level (air or nitrox without deco, or one trimix dive with deco). Also courses from cavern to full cave, sidemount, CCR and scooter, rental of overhead gear, a shop and accommodation. Contact: Olivier.

Where to sleepAround Cajarc on Booking.com ↗

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Other sites6 within 12 km

News

All (2)

Nearby

Articles about cave diving that name a place within 25 km of this site, but no cave by name. They're not necessarily about this site.

Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 11 Nov 2026.

More of the latest in Lot (France): conditions, closures and news →

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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:

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Based on personal notes; page numbers refer to Stefan Schiemann's Cave Diving Guide. Certification requirements are estimates — no substitute for local knowledge. Drive times: from Marcilhac taken from the guide, elsewhere calculated by road (OSRM, OpenStreetMap). The Doux de Coly and six springs that are closed to divers come from public sources (plongeesout/FFS, the CDS46 list of springs with access rules, Sept 2026). The pins of 14 of the 16 sites listed by The Cave To Be (Gramat) on its website come from there (Oct 2026); the Pou-Meyssen pin comes from The Hidden River Project, and the Marchepied pin was checked and kept. Access, sumps, history and hazards of many sites were added in November 2026 from public sources: the FFS site sheets (plongeesout), Spelunca, FFESSM magazines, the CDS46 and Grotto Map; the pins of Meyraguet, Goul Naou and the Oeil de la Doue come from the FFS. In November 2026 the CDS du Lot named by e-mail the 16 springs that divers may visit; the other springs in the Lot are marked closed.