Doubs and Jura · about 9 km from Champagnole
Source de l'Ain
- Max depth36 m
- CertificationFull cave
Diving and fills
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Fills nearby
- Fill stationplongee.ch (Puidoux/Rivaz, Zwitserland)Air, nitrox, heliox, trimix, O₂ and helium; 200 and 300 bar outletsRoute ↗
- Fill stationDiveStation (Neuchâtel, Zwitserland)Air, nitrox and trimix up to 300 bar; nitrox and trimix only during opening hours. O₂: ask.Route ↗
What it looks like
Plongée Souterraine à la Source de l'Ain avec l'A7S2 Cave diving - Source de l'Ain 2022 2013.01.13 Source de l'Ain plongée cave baptême Percage dans la source de l'Ain, plongée spéléo
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Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
Plongée Souterraine à la Source de l'Ain avec l'A7S2 Cave diving - Source de l'Ain 2022 2013.01.13 Source de l'Ain plongée cave baptême Percage dans la source de l'Ain, plongée spéléo
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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 karst spring of the Ain lies in a narrow wooded valley between Conte and La Favière, near Nozeroy (681 m). Clubs from the Jura, Dijon and Saint-Claude explored it in 1969–1985; no more recent data are known.
Profile and sections
The karst spring of the Ain lies in a narrow wooded valley between Conte and La Favière, near Nozeroy (681 m).
Clubs from the Jura, Dijon and Saint-Claude explored it in 1969–1985; no more recent data are known.
- Depth and profile
- Three sumps, explored 1969–1985: temporary sump to -28 m (water level varies with the season) · downstream sump to -36 m, ends at an impassable restriction (1985) · Siphon des Plaques (upstream) -18 to -28 m, with a 21 m flooded shaft. Explored lengths ~40–180 m per sump.
- Configuration
- No recent data on passage size; the sumps end in restrictions and a slot.
- DPV: Not DPV-suitable (estimate)
- Short sumps ending in restrictions: no scooter.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Configuration unknown — research beforehand
- Goes down to 36 m (trimix or deco may be needed)
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
The sumps are inside the cave at the spring; the downstream sump is ~60 m from the entrance, so you carry your gear in. Old rule (plongeesout): phone the Nozeroy gendarmerie beforehand with the number of divers and your times in and out.
Around Source de l'Ain
Fills2 fill stations · nearest 64 km
plongee.ch (Puidoux/Rivaz, Zwitserland)
Route du Verney 18, 1070 Puidoux, Switzerland
Air, nitrox, heliox, trimix, O₂ and helium; 200 and 300 bar outlets
Mon–Fri 9:00–12:00 and 13:30–18:30, Sat 9:00–16:00; air station 24/7 for subscribers
Dive shop in Puidoux (Rivaz); one of the most complete gas lists in the area. Air-station subscription CHF 180 a year (couple CHF 290); air CHF 6–12 per cylinder, +CHF 2 for 300 bar. Walk-in trimix fills for visitors: ask.
DiveStation (Neuchâtel, Zwitserland)
Route de la Pierre-à-Mazel 4, 2000 Neuchâtel, Switzerland
Air, nitrox and trimix up to 300 bar; nitrox and trimix only during opening hours. O₂: ask.
Tue–Fri 9:00–12:00 and 13:30–18:30, Sat 9:00–16:00; air station 24/7 (subscription: ask)
Dive shop with a fill station; formerly the Neuchâtel branch of plongee.ch. The nearest known trimix address. CCR supplies (sorb) and walk-in fills for visitors: ask.
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