Plynlimon

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 / 52.4675; -3.7828
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

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.