Deepest caves
| Rank | Cave Name | Length (km) | Vertical Range (m) | Region | Type | More Info |
|---|---|---|---|---|---|---|
| 1 | Poll na gCeim | < 1 | 181 | Co. Clare | All cave | Short description |
| 2 | Carrowmore Caverns | < 1 | 142 | Co. Sligo | All cave | |
| 3 | Poulnagollum - Poulelva | 16 | 140 | Co. Clare | All cave | Short description |
| 4 | Polliska | < 1 | 134 | Co. Sligo | All cave | Short description |
| 5 | Poulnagree | 5.2 | 130 | Co. Clare | All cave | |
| 6 | Pollatoomary | < 1 | 103 | Co. Mayo | All cave | Short description |
| 7 | Faunarooska Cave | 1.69 | 94 | Co. Clare | All cave | |
| 8 | Dragonfly Pot | < 1 | 90 | Co. Sligo | All cave | |
| 9 | Poll na Gonzo | < 1 | 90 | Co. Clare | All cave | Short description |
| 10 | Pollnaleprechauns | < 1 | 84 | Co. Leitrim | All cave | |
| 11 | Pollnaindre | 1 | 82 | Co. Galway | All cave | |
| 12 | Pollballiny | 2.065 | 80 | Co. Clare | All cave | |
| 13 | Cullaun Three | 3.5 | 78 | Co. Clare | All cave | Short description |
| 14 | Deep Pot on Largy | < 1 | 76 | Co. Leitrim | All cave | |
| 15 | Poll Ballynahown | < 1 | 75 | Co. Clare | All cave | |
| 16 | Coolagh River Cave | 5.285 | 72 | Co. Clare | All cave | |
| 17 | Small Polldeelin (Poulnacapple) | 1.5 | 71 | Co. Galway | All cave | |
| 18 | Poulnaswithin (Largy Rift CPC No.1) | < 1 | 71 | Co. Leitrim | All cave | |
| 19 | Pollnatagha - Pollprughlish - Polliniska | < 1 | 70 | Co. Cavan | All cave | Short description |
| 20 | Polticoghlan | < 1 | 70 | Co. Leitrim | All cave | |
| 21 | Poulomega | < 1 | 70 | Co. Clare | All cave | |
| 22 | Ramsons Pot | < 1 | 70 | Co. Leitrim | All cave | |
| 23 | Pollballyelly | < 1 | 68 | Co. Clare | All cave | |
| 24 | Pollnagollum Slieve Rushen | < 1 | 65 | Co. Cavan | All cave | |
| 25 | Polltoophill - Polldeelin | 2.4 | 62 | Co. Galway | All cave | |
| 26 | Largy Rift II - 4 | < 1 | 60 | Co. Leitrim | All cave | |
| 27 | Poll Dearg | < 1 | 60 | Co. Clare | All cave | |
| 28 | Teampall Shetric | < 1 | 60 | Co. Leitrim | All cave |
If you don't see the cave you want, but you know it should be in the RO Ireland section, remember that this list only shows caves with at least 60 m depth of natural passage. Other caves may show up in the list of longest caves in RO Ireland.
However, if you are looking for a specific cave that does have at least 60 m depth of natural passage, and should be listed here, please let me know about it so I can update the database.