Lot · about 8 km from Cajarc
Émergence de Bons
Closed to divers
Not accessible to divers: the spring is not on the CDS du Lot's list of sites where diving is allowed (November 2026). According to the CDS the other springs are closed, for example because the owner refuses or because drinking water is pumped there.
- Max depth20 m
- CertificationFull cave
- SpecialSidemount
Diving and fills
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Fills nearby
- Lot Filling Station (Proteushop)Air, nitrox (any %), trimix (incl. 21/35, 18/45, 15/55, 10/70 and custom), O₂ 200/300 bar
- The Cave To BeAir, nitrox and trimix up to 320 bar (standard 21/35, 18/45, 15/55, 10/50), O₂ up to 220 bar
Now at Émergence de Bons
What it looks like
All 1 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
Beyond the short S1 lies a hall with a natural bridge. S2 can only be reached by serious climbing with rope or ladder.
Profile and sections
Beyond the short S1 lies a hall with a natural bridge. S2 can only be reached by serious climbing with rope or ladder. The first 100 m of S2 are tight, with an eye-shaped profile (about 4 by 1.6 m in a bedding plane), and there is sediment on the floor, the line and the ceiling. Measured visibility: from 50 cm to 7 m going in, and 0.5–1.5 m coming out; rain in the week before makes the water murky.
The dry part has been known since 1949. Divers got through S1 and S2 in 1969, and S2 (300 m, -11 m) was passed in 1980. Between 2000 and 2005 divers explored and surveyed the system to 2,947 m, 1,135 m of it underwater, with more than ten sumps; in the west branch of S8 they reached -18.5 m in 2005.
Practical: trips to the far end take up to 10 hours, with long tight sumps, cold and fatigue.
- Depth and profile
- Main route: S2 300 m / -11 m. Further on S4 100 m / -4, S5 125 m / -4, S7 119 m / -6 and S8 100 m / -6; in the west branch of S8 -18.5 m, with a low point around -20 m
- Configuration
- Backmount is possible, but sidemount (or twin 7 L) is easier to handle: serious climbing to S2, and the first 100 m of S2 are tight.
- DPV: Not DPV-suitable
- Rope or ladder climb to reach S2; first 100 m of S2 tight, sediment everywhere
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / Small cylinders / no-mount (speleo sumps)
- Goes down to 20 m (trimix or deco may be needed)
- Ropework (SRT) needed
- Experienced divers only
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
Commune of Larroque-Toirac: ~1 km downstream of the village, at the back of the Cirque de Bons on the right bank of the Lot. The fossil entrance is ~15 m above where the water comes out. Long approach with a steep climb, rope handy.
Around Émergence de Bons
Fills2 fill stations · nearest 12 km
Lot Filling Station (Proteushop)
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
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.
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.
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