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Dominican Republic

Trou Nicolás (Pedernales)

  • Max depth39 m (128 ft)
  • CertificationFull cave
  • Water temperature≈ 24–26 °C (75–79 °F)estimated, no reports yet
  • SpecialExperienced divers

The dive

Fresh water without flow, no formations. A challenging cave: by 2003 only four divers had dived it completely. It was first explored by Denis Bourret (Golden Arrow).

Lots of sediment on the walls, ceiling and floor, and a restriction in the main passage: visibility can go quickly.
Profile and sections

Fresh water without flow, no formations. A challenging cave: by 2003 only four divers had dived it completely. It was first explored by Denis Bourret (Golden Arrow). Two other pools nearby are not connected.

Practical: through Golden Arrow (Santo Domingo).

Depth and profile
To about -39 m; about 244 m long. From the pool a tunnel at -12 m to a room where the main passage starts, with a restriction after about 80 m; three side passages on the left not yet explored.
Configuration
Twin 11 l (80 cft) cylinders for the whole cave (2003).
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR
  • Whole caveGoes down to 39 m (trimix or deco may be needed) · doesn't decide who may dive
  • Whole caveExperienced divers only · doesn't decide who may dive
Experienced divers

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

In Pedernales province in the south-west, close to the Haitian border, about 335 km from Santo Domingo. Near the road: the easiest cave to reach in the area. A pool of about 6 × 4 m; jump in from 3 m or walk down over the rocks. The largest of the 'Pozos Ecológicos' of Pedernales; people swim there too.

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Around Trou Nicolás (Pedernales)

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Sources, sharing and disclaimer

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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 (DRSS dr-ss.com, Dive Dominicana, Dominican Divers, Scuba Diving, Advanced Diver, World Nomads, divemasteraustin.com, showcaves.com, godominicanrepublic.com, Dominican press, DAN; Oct 2026), the book Las cuevas sumergidas de República Dominicana (environment ministry / Fundación Espeleobuceo Hispaniola, 2003; facts only); Dive Dominicana's gases and prices confirmed by Dive Dominicana, and Golden Arrow's details by Golden Arrow (Oct 2026). Oleg's Bat House and Sistema La Negra were added in Nov 2026 (DRSS, Dive Dominicana, Dominican Divers, and for Oleg's Bat House Caving News and DR1 after Listín Diario, 2011). The DRSS descriptions date from around 2013. Pins only where a source gives them; the caves on private land around Santo Domingo deliberately without a pin. Rules, prices and access change — check with your guide.