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Ireland and Northern Ireland · about 10 km from Blacklion

Noon's Hole – Arch Cave (Fermanagh)

Info · exploration

Information only: this cave was explored by cave-diving expeditions, and we know no dive centre, guide or club that takes visitors.

  • CertificationFull cave
  • SpecialSidemount

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Now at Noon's Hole – Arch Cave (Fermanagh)

Status
Closed

The dive

The water here is always particularly cold. In 1972 Martyn Farr and Roger Solari dived an 80 m sump and an 8 m sump and went on for ~1.5 km; in 1973 a 49 m dive followed into the After-Noon Series.

Profile and sections

The water here is always particularly cold. In 1972 Martyn Farr and Roger Solari dived an 80 m sump and an 8 m sump and went on for ~1.5 km; in 1973 a 49 m dive followed into the After-Noon Series. Since 1984 there has also been a dry link to Arch Cave.

Depth and profile
System of 3.7 km and 108 m deep · sumps of 80 m, 8 m and 49 m · Arch Cave ends at a sump of ~60 m
Configuration
Through-trip for experts: full ropework and light sidemount.
Who can dive where
  • CaveAt least Full cave
  • Whole caveConfigurations: Sidemount / Small cylinders / no-mount (speleo sumps)
  • Whole caveRopework (SRT) needed
  • Whole caveExperienced divers only · doesn't decide who may dive
RopeworkDry sections / haulingExperienced diversDepends on water level or swell

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 the townland of Old Barr, ~5 km north-west of Boho, Fermanagh (ASSI). Noon's Hole is a 78–81 m shaft (sources differ); Arch Cave has ~1 km of swims and the tight "Duncan's Duck". Access rules: ask.

Plan your route ↗

Around Noon's Hole – Arch Cave (Fermanagh)

No provider in Ireland yet

The caves here are listed as information only: we don't know a dive centre, guide or club yet that takes visitors, so you can't plan a trip here yet. Do you know one, or are you one? Let us know.

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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 (Oct 2026): Wikipedia, Darkness Below (Pollatoomary 2025), InDEPTH, UBSS Proceedings (1986), the Northern Pennine Club (1987), ukcaves.co.uk, the Burren Geopark, Grottocenter, the Speleological Union of Ireland (access), NIEA's Earth Science Conservation Review, cavesofireland.com, the Cuilcagh Lakelands Geopark, Saolta (University Hospital Galway), thejournal.ie, BSAC and the British Hyperbaric Association. Every cave is listed as information: we know no provider that takes visitors. Pins from OpenStreetMap, Wikipedia and the ESCR. ~ = estimate, ask = not confirmed.