Hay Bluff
Hay Bluff (Welsh: Penybegwn) is a prominent hill at the northern tip of the Black Mountains, an extensive upland massif which straddles the border between south-east Wales and England. The mountain sits at the point where the main northeast-facing escarpment of the Black Mountains meets the northwest facing escarpment, the next peak to the west being Twmpa. The flat summit of Hay Bluff which is marked by a triangulation pillar at a height of 677 metres (2,221 ft) overlooks the middle Wye Valley and the book town of Hay-on-Wye.
| Hay Bluff | |
|---|---|
Hay Bluff viewed from the north | |
| Highest point | |
| Elevation | 677 m (2,221 ft) |
| Prominence | 11 m (36 ft) |
| Listing | Deleted Nuttall |
| Coordinates | 52.0229°N 3.1027°W |
| Geography | |
| Location | Powys, Wales |
| Parent range | Black Mountains |
| OS grid | SO24433662 |
The hill is largely within the Welsh county of Powys though parts of its eastern flanks lie within the English county of Herefordshire. In 2024 a monolith similar to the one in Utah was found atop the hill. It is unknown who placed it there or for what purpose.