Hills of Britain and Ireland
Ireland : Offaly
| C | County | Area | Id. | Name | Feet | Metres | Drop | Relative | Notes |
|---|---|---|---|---|---|---|---|---|---|
| I | Offaly | North Midlands | 20539 | Croghan Hill | 768 | 234 | 145 | Hump | |
| I | Offaly | Slieve Bloom | 20895 | Cumber Hill | 1037 | 316 | 118 | Hump | |
| I | Offaly | Slieve Bloom | 20876 | Knocknaman | 1106 | 337 | 131 | Hump | |
| I | Laois/Offaly | Slieve Bloom | 20258 | Arderin | 1729 | 527 | 420 | Marilyn |
Notes
- Data: Database of British and Irish Hills v18.0
- Relative height, drop, or prominence is the height difference between a hill's summit and the col (lowest point) connecting it to the next higher summit. "Marilyns" are hills with a relative height of 150 metres, and "Humps" have 100 metres. There are some even in the south east of England.
- We use OS mapping for England, Scotland, Wales, and the Isle of Man. Sadly, Channel Islands, Northern (OSNI) and Southern Ireland (OSI) mapping isn't available online, so we use Openstreetmap.