Battle of Mynydd Hyddgen

Clipyn Du is a mountain in northern Powys in Wales. Also known as Tarren Bwlch-Gwyn or Siambwr Trawsfynydd, it is one of the higher summits of the area and is located a few miles north of Pumlumon. Tarren Bwlch-Gwyn is the name of a steep-sided escarpment nearby. It is classed as a HuMP, having over 100 metres of Topographic prominence. Nearby is a lake, Glaslyn.

Siambr Trawsfynydd is a mountain in Ceredigion, Wales, located to the north of Pumlumon. It is 582 m (1,910 ft) above sea level and one of the higher summits of the area. To the east is Glaslyn lake and the steep-sided Tarren Bwlch-Gwyn.

Pumlumon Fach is a top of Pen Pumlumon Fawr on the Plynlimon massif, a part of the Cambrian Mountains in the county of Ceredigion, Wales. It lies on small ridge heading north-west from the summit of Pen Pumlumon Fawr. The summit is marked by small cairn, and overlooks the Nant-y-moch Reservoir to the north and Llyn Llygad Rheidiol to the east. The views also include the smaller summits of Drosgol (550m) and Banc Llechwedd-mawr (560m) and Cwm Hyddgen, a hide out of Owain Glyndŵr and his army.

Plynlimon, also spelled as 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 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.

Pen Pumlumon Llygad-bychan is a subsidiary summit of Pen Pumlumon Fawr and the third highest summit on the Plynlimon massif, a part of the Cambrian Mountains in the county of Ceredigion, Wales. It is not named on Ordnance Survey walking maps. The summit is boggy, and is marked by a few stones. The views include Rhos Fawr, Drygarn Fawr, Pen y Garn to the south and Aran Fawddwy, Glasgwm, Tarrenhendre and Tarren y Gesail to the north. The River Wye, has its source just south of the summit. The glacial lake of Llyn Llygad Rheidiol lies to the north.

Pistyll y Llyn is one of the tallest waterfalls in Wales and the United Kingdom. It is a horsetail style set of falls which are located in the Cambrian Mountains about 2+1⁄2 miles (4 kilometres) from Glaspwll in Powys, Wales. It is formed where the River Llyfnant falls from Llyn Penrhaeadr for approximately 525 feet (160 metres) into Cwm Rhaeadr in two waterfalls, and a series of cascades. The tallest waterfall is a single horsetail drop of 300 ft (91 m). This is sometimes mistakenly stated as 240 ft (73 m).

Y Garn is a subsidiary summit of Pen Pumlumon Fawr and the fourth highest peak on the Plynlimon massif, a part of the Cambrian Mountains in the county of Ceredigion, Wales. The summit is marked by a large shelter cairn, hollowed out from an ancient burial cairn. The views include Rhos Fawr, Drygarn Fawr, Pen y Garn to the south and Aran Fawddwy, Glasgwm, Tarrenhendre and Tarren y Gesail to the north. The Nant-y-moch Reservoir can also be seen to the north, with the smaller summits of Drosgol at 550 m (1,800 ft) and Banc Llechwedd-mawr at 560 m (1,840 ft). both Marilyns.

Nant-y-moch Reservoir (Welsh pronunciation ) is situated in the Cambrian Mountains in northern Ceredigion, Wales, near Pumlumon. The reservoir which flooded a part of the valley of the River Rheidol and its headwaters derives its name from a stream, the Nant-y-moch (in English = the pigs stream,), which formerly flowed into the River Rheidol at this spot. The dam is about three miles north of the village of Ponterwyd. The reservoir forms part of the Cwm Rheidol hydroelectric power scheme and the headwaters of the reservoir include the source of the River Rheidol. The Nant-y-moch component of the hydroelectric scheme has an installed capacity of 13 MW generated as the water from Nant-y-moch enters Dinas Reservoir.

Pen Pumlumon Arwystli is the second highest summit on the Plynlimon massif, a part of the Cambrian Mountains in the county of Ceredigion, Wales. The summit is grassy, and is marked by 3 large ancient cairns. The views include Rhos Fawr, Drygarn Fawr, Pen y Garn to the south and Aran Fawddwy, Glasgwm, Tarrenhendre and Tarren y Gesail to the north. The longest river in Britain, the River Severn, has its source on a lower boggy plateau to the north of the summit.

Banc Bugeilyn is a hill found in Plynlimon between Aberystwyth and Welshpool in the United Kingdom; grid reference SN826925.The summit is class as a Dewey. The height of the summit from sea level is 551 m (1808 ft).

Blaenrheidol is a community in the county of Ceredigion, North Wales. It lies in the Cambrian Mountains of Mid Wales, approximately 12 miles (19 km) east of Aberystwyth on the A44 road, and includes Pumlumon. It includes the settlements of Ponterwyd, Ystumtuen and Llywernog. As the name suggests, a large section of the Afon Rheidol is in the community as well as the large man-made reservoir of Nant-y-moch.

Aberhosan (Welsh pronunciation ) is a village in the Welsh principal area of Powys, located between the town of Machynlleth and village of Dylife. It is in the historic county of Montgomeryshire.