Anglesey and the Lleyn Peninsula
One of the 96 hill-survey regions used by the Database of British & Irish Hills. Every hill we track in this region is listed below, tallest first — follow any name for its full record, live summit weather and daylight times.
- Hills listed
- 4
- Highest hill
- Yr Eifl 560.7 m
- Mean height
- 453 m
- Marilyns
- 3
Access rights in this region
Conditional Right to roam in Wales: Right to roam only on mapped CRoW open access land —full Wales access guide.
This is the general position, not legal advice — local byelaws, seasonal restrictions and closures can override it. See the country-by-country access guide, or query an exact grid reference with the access checker.
All 4 hills, tallest first
| # | Hill | Height | Prominence | Classifications | Grid ref |
|---|---|---|---|---|---|
| 1 | Yr Eifl | 560.7 m | 429 m | Trail 100MarilynHuMP+1 | SH364447 |
| 2 | Gyrn Ddu | 522.1 m | 386 m | MarilynHuMPDewey | SH401467 |
| 3 | Bwlch Mawr | 510.3 m | 147.6 m | HuMPDewey | SH426478 |
| 4 | Holyhead Mountain | 220 m | 220 m | Historic County TopCurrent County/UA TopMarilyn+1 | SH218829 |
Hill data from the Database of British & Irish Hills v18.3 (CC BY 4.0). Prominence is the drop to the hill's key col; a dash means it is not recorded in our dataset.
Browse the other survey areas on the regions hub, check what you can do at a specific spot with the access checker, and read oursafety notes before heading up — hill days here can outlast daylight, especially in winter.