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La Fuentona

Northern Spain · about 1 km from Muriel de la Fuente

La Fuentona

  • Max depth115 m
  • CertificationFull cave
  • SpecialExperienced divers

Diving and fills

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What it looks like

All 3 videos and posts

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.

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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

La Fuentona is the source of the Abión: a very deep sump with a large boulder field. In 2008 Amaya Olea and Dani Santamaría reached -115 m in S2 on rebreathers (16 divers, >500 kg of gear).

According to the local paper, exploring La Fuentona has already cost five lives.
After heavy winter rain the outflow increases strongly.
S1 already reaches -54 m and S2 -115 m: plan your gas and your turn point for that.
Profile and sections

La Fuentona is the source of the Abión: a very deep sump with a large boulder field. In 2008 Amaya Olea and Dani Santamaría reached -115 m in S2 on rebreathers (16 divers, >500 kg of gear). A UTD team made a 3D photogrammetry survey in 2021.

Practical: the spring lies in the La Fuentona Natural Monument (1998). Swimming is prohibited. Cave diving here is tightly restricted: ask the Sección de Espacios Naturales of the Junta de Castilla y León in Soria for permission well in advance.

Depth and profile
S1: split ~50 m from the entrance, branches rejoin around -40 m, down to -54 m, then a steep rise to an air chamber · S2 to -115 m at ~320 m (2008)
Configuration
S1 in backmount or sidemount; S2 is expedition diving (CCR, gear carried through air-filled passages)
DPV: DPV possible (estimate)
Short, deep sump with boulders: little gain
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 115 m (trimix or deco may be needed) · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced diversDepends on water level or swellPermission 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

Car park P2 (regulated and paid at busy times) is ~800 m from the spring; gear goes along the footpath on carts (2–3 trips). With a permit and a ranger a 4x4 can reach the pool. Large pool at the entrance.

Plan your route ↗

Around La Fuentona

FillsNo fill station known nearby
Where to sleepAround Muriel de la Fuente on Booking.com ↗

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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 (G.E. Edelweiss, G.E. Niphargus, Espeleobuceo en Burgos blog, Matienzo Caves Project, UTD, Pegasus Caving Club, Soria Noticias, Turismo Burgos, BOE Ley 15/2008, Montaña Regulada, the SEMH hyperbaric-centre list, dive-centre websites, Wikipedia; Sept 2026). Pins from Wikipedia, club catalogues (UTM converted to WGS84) and OSM; ~ = estimate (drive times too). Rules change — check locally. Ojo Guareña and A Buraca das Choias: Cuevas Turísticas, the Espeleobuceo en Burgos blog (S.I.E. Burgos), BurgosNoticias, G.E. Edelweiss, El Progreso, GCiencia, Malamalama, Aventuras en Galicia and the Colegio de Enfermería de A Coruña (Ferrol chamber).