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| Pen Pumlumon Fawr | |
|---|---|
 The northern slopes of Pumlumon Fawr | |
| Highest point | |
| Elevation | 752 m (2,467 ft) |
| Prominence | 526 m (1,726 ft) |
| Listing | Marilyn, Hewitt, Council top, Nuttall |
| Coordinates | 52°28′03″N 3°46′58″W / 52.4675°N 3.7828°W |
| Naming | |
| English translation | five tops, five beacons |
| Language of name | Welsh |
| Pronunciation | Welsh: [ˈpɛn pɪmˈlɪmɔn ˈvau̯r] |
| Geography | |
| Location | Ceredigion, Wales |
| Parent range | Cambrian Mountains |
| OS grid | SN789869 |
| Topo map | OS Landranger 135 |
| Name | Grid ref | Height | Status |
|---|---|---|---|
| Pen Pumlumon Arwystli | SN815877 | 741 m | Hewitt, Nuttall |
| Pen Pumlumon Llygad-bychan | SN799871 | 727 m | Hewitt, Nuttall |
| Y Garn | SN775851 | 684 m | Hewitt, Nuttall |
| Pumlumon Fach | SN787874 | 664 m | Nuttall |
| Pumlumon Cwmbiga | SN830899 | 620 m | Deleted Nuttall |
| Carnfachbugeilyn | SN826903 | 622 m | Unclassified |
| Bryn yr Ŵyn | SN840927 | 502 m | Dewey |
Plynlimon, or Pumlumon in Welsh (also historically anglicised as Plinlimon and Plinlimmon), is the highest point of the Cambrian Mountains in Wales (taking a restricted definition of the Cambrian Mountains, excluding Snowdonia, the Berwyns and the Brecon Beacons), and the highest point in Mid Wales. It is a massif that dominates the surrounding countryside and is the highest point (county top) of Ceredigion (both the modern council area, and the historic county, also known as Cardiganshire).
The highest point of the massif itself is Pen Pumlumon Fawr, which is 752 metres (2,467 ft) above ordnance datum. Its other important peaks are Pen Pumlumon Arwystli, Y Garn, Pen Pumlumon Llygad-bychan and Pumlumon Fach. Bryn yr Ŵyn, or 'hill of the lambs', is a former Dewey in the foothills.
The longest river in Britain, the River Severn, has its source on the mountain, as do the rivers Wye and Rheidol.
Folklore says there is a sleeping giant in Plynlimon.