Mynydd Llangatwg or Llangattock Mountain is a hill in the Brecon Beacons National Park in the county of Powys, south Wales. It is named from the village of Llangatwg (or 'Llangattock') which sits in the valley of the River Usk to the north of it. It is essentially an undulating plateau rising in the west to a height of 530 metres (1,740 ft) at grid reference SO171157 and in the east to a height of 529 metres (1,736 ft) at Hen Dy-aderyn / Twr Pen-cyrn. This spot is marked by a trig point. The shallow pool of Pwll Gwy-rhoc sits in a broad depression towards the northern edge of the plateau whilst a smaller pool frequently occupies a large shakehole a few hundred metres to its west. The hill forms an impressive northern scarp overlooking the Usk valley and commonly referred to as the Llangattock Escarpment. Its southern margins are more subdued. Its eastern end is defined by the drops into the Clydach Gorge. Beyond the B4560 to the west the hill merges with Mynydd Llangynidr which has a similar character.[1]
Looking south east across Mynydd Llanagatwg from Ty Aderyn with periglacial boulder stream in foreground. (November 2005)
Particular features of note include 'The Lonely Shepherd', an isolated limestone pinnacle which stands at the eastern tip of the plateau, left there by quarryworkers who removed great quantities of the surrounding rock. A number of cairns are scattered across the hill, notably the sizeable pair which decorate the summit of Twr Pen-cyrn and which are thought to be of Neolithic age. Some freshwater ponds litter the mountain, including Pwll Gwy-rhoc the "witches pool". A more recent addition to the landscape was Cairn-Mound Reservoir which once impounded the headwaters of Nant yr Hafod on the southern slopes though Welsh Water abandoned this some years ago and its bed has revegetated, though the embankment remains. A couple of gas pipelines have been laid across the mountain and their courses can be traced variously by fences, vegetation changes and marker poles.
^Ordnance Survey: Explorer map sheet OL13 Brecon Beacons National Park (Eastern area) ISBN 978-0-319-46741-1
MynyddLlangatwg or Llangattock Mountain is a hill in the Brecon Beacons National Park in the county of Powys, south Wales. It is named from the village...
above and there is evidence that there is much waterflow, from much of MynyddLlangatwg, emerging in the Pwll y Cwm oolite, which is the resurgence for Ogof...
Passing east across the B4560, the hill merges with MynyddLlangatwg which has a similar character. Mynydd Llangynidr is formed from a layer cake of Palaeozoic...
example extensive doline fields have developed at Cefn yr Ystrad, MynyddLlangatwg and Mynydd Llangynidr in South Wales across a cover of Twrch Sandstone which...
Ogof y Daren Cilau is a cave system in the limestone escarpment on MynyddLlangatwg (Llangattock Mountain), which is south of Llangattock village and above...
Black Mountains, west to the Brecon Beacons and south to Mynydd Llangynidr and MynyddLlangatwg. About 2 miles (3 km) to the northwest is the hill of Allt...
Brecknock. Brynmawr Sections Cwm Clydach Cwm Merddog Woodlands MynyddLlangatwg (Mynydd Llangattock) List of SSSIs by Area of Search "Find protected areas...
the Brecon Beacons National Park and the plateau surfaces of MynyddLlangatwg and Mynydd Llangynidr in the east. Faulted blocks of the Twrch Sandstone...
wildlife, particularly plants. It is situated on the north side of MynyddLlangatwg in Llangattock community, about 2 miles (3.2 km) south-west of Crickhowell...
part of the park from Blorenge in the east through Gilwern Hill, MynyddLlangatwg, Mynydd Llangynidr, Cefn yr Ystrad, Cefn Cil Sanws and Moel Penderyn to...
Powys. These quarries are found on the broadly north-facing scarps of MynyddLlangatwg, Gilwern Hill and Blorenge. Substantial quarries also operated within...
Bat Sites SAC, which also extends across much of the neighbouring MynyddLlangatwg. There are, in addition, numerous scheduled ancient monuments within...
Llangattock Lingoed (Welsh: Llangatwg Lingoed) is a small rural village in Monmouthshire, south east Wales. It is located approximately five miles north...
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