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Pen Pumlumon Fawr
Pumlumon Fawr.jpg
The northern slopes of Pumlumon Fawr
Highest point
Elevation752 m (2,467 ft)
Prominence526 m (1,726 ft)
Parent peakPen y Fan
ListingMarilyn, Hewitt, Council top, Nuttall
Coordinates52°28′03″N 3°46′58″W / 52.4675°N 3.7828°W / 52.4675; -3.7828Coordinates: 52°28′03″N 3°46′58″W / 52.4675°N 3.7828°W / 52.4675; -3.7828
Translationfive-peaked mountain, big peak (Welsh)
PronunciationWelsh: [ˈpɛn pɪmˈlɪmɔn ˈvauɾ]
LocationCeredigion, Wales
Parent rangeCambrian Mountains
OS gridSN789869
Topo mapOS Landranger 135
Listed summits of Plynlimon
Name Grid ref Height Status
Pen Pumlumon Arwystli SN815877 741 m Hewitt, Nuttall
Pen Pumlumon Llygad-bychan SN815877 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

Plynlimon (anglicised from Pumlumon in Welsh, meaning "five peaks") is the highest point of the Cambrian Mountains in Wales, and the highest point in Mid Wales. It is a massif that dominates the countryside of northern Ceredigion.

The highest point of the massif itself is Pen Pumlumon Fawr at 752 metres (2,467 ft). Its other important peaks are Pen Pumlumon Arwystli, Y Garn, Pen Pumlumon Llygad-bychan and Pumlumon Fach.

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 Pumlumon.


The Pumlumon area is the largest watershed in Wales and is the source of the rivers Wye, Severn and Rheidol. Since 2007 the Wildlife Trusts of Wales have been working to improve the habitat as a "living landscape" project. This watershed area has been affected by loss of biodiversity, erosion of the peaty soils' structure, and accelerated drainage.[1] Some believe the drainage issues have contributed significantly to flooding in areas some distance downstream, though this cannot be clearly proved.

Like most of the uplands across Wales, intensive land use activities have resulted in many habitats being either lost or degraded. Over-grazing of sheep has induced soil compaction, which has resulted in increased flooding of the lowland areas. The principal land cover within the project area is dominated by a complex mosaic of locally, nationally and internationally important habitats and species, such as dry and wet dwarf-shrub heathland, blanket bog, unimproved acid grassland and a number of oligotrophic lakes. Agriculturally improved grassland, broadleaved woodlands and forestry plantation are also characteristic features of the area.

The Pumlumon area is also important for breeding, wintering and feeding bird fauna particularly hen harrier, merlin, short-eared owl and red and black grouse, and a number of Red Data Book and UK BAP invertebrates.[2] The red kite also frequents the area. Golden Plovers have declinded by 92% since 1992. [3]

Severn Way[edit]

The Severn Way runs for 210 miles (337 km) along the River Severn between the mouth of the Severn at Bristol, England, and its source at Pumlumon, Wales.


  1. ^ The Pumlumon Project, Montgomeryshire Wildlife Trust
  2. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.
  3. ^ [1] Birdguides

External links[edit]