Doubs and Jura
Source du Planey
- Max depth32 m
- CertificationFull cave
- Water temperature≈ ~11 °Cestimated, no reports yet
- SpecialSidemount
Diving and fills
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What it looks like
Plongée souterraine à la source du Planey ( Anjeux 2021 ) sortie plongée souterraine Source du Planey 2022 Diving Source Du Planey, France - June 2022 Exploration à la Source du Planey, 08 juin 2019
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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 du Planey ( Anjeux 2021 ) sortie plongée souterraine Source du Planey 2022 Diving Source Du Planey, France - June 2022 Exploration à la Source du Planey, 08 juin 2019
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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
A turquoise spring pool in the woods near Saint-Loup-sur-Semouse, with water at 11 °C all year. Visibility is poor at the entrance and excellent in the chamber, but often zero on the way out because of silt.
1 earlier accident or incident has been reported at this cave. Read what happened ↓
Profile and sections
A turquoise spring pool in the woods near Saint-Loup-sur-Semouse, with water at 11 °C all year. Visibility is poor at the entrance and excellent in the chamber, but often zero on the way out because of silt.
Discharge is 0.85–2.17 m³/s. The spring has been explored since 1969 (Spéléo-Club de Dijon, SC Vesoul, SMAG), and clubs still dive it (2020).
Practical: swimming is banned.
- Depth and profile
- Top of a flooded shaft at 30 m / -17 m (1969) · end chamber at 153 m / -25 m (1973) · end point 185 m / -32 m on unstable rubble (1993). The tourist office says 'more than -35 m'.
- Configuration
- The second half is tight: open-circuit sidemount fits best. In 2018 one diver could not get past a point at -32 m.
- DPV: Not DPV-suitable (estimate)
- Short (185 m) and tight in the second half: no scooter.
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 32 m (trimix or deco may be 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
Permission beforehand: request access from the mairie d'Anjeux (mairie-anjeux@orange.fr), the official contact. It brings in the municipal councillor who opens the barrier. You drive via Anjeux; after ~1 km there is a car park with a locked barrier. Drive through with your vehicles and close the barrier behind you. Mandatory: phone the gendarmerie before and after the dive, 03 84 49 00 17 (+33 3 84 49 00 17). Confirmed by the site's manager, Oct 2026.
approximate location
Around Source du Planey
FillsNo fill station known nearby
Caves nearby1 within 60 km
News
All (1)
Accidents and incidents
What happened at this cave before, with the sources. No names are given; read it as a lesson for your own planning.
- Fatal diving accident on 20 June 1976; access was restricted afterwards.
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 13 Nov 2026.
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