The Lledr Valley () is a valley in

Snowdonia Snowdonia, or Eryri (), is a mountainous region and National parks of the United Kingdom, national park in North Wales. It contains all 15 mountains in Wales Welsh 3000s, over 3000 feet high, including the country's highest, Snowdon (), which i ...

north North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

. It runs from the top of the Crimea Pass, north of

Blaenau Ffestiniog Blaenau Ffestiniog () is a town in Gwynedd, Wales. Once a slate mining centre in historic Merionethshire, it now relies much on tourists, drawn for instance to the Ffestiniog Railway and Llechwedd Slate Caverns. It reached a population of 12,0 ...

down to

Betws-y-Coed Betws-y-Coed () is a village and community (Wales), community in Conwy County Borough, Wales. The village is located near the confluence of the River Conwy and the River Llugwy and is on the eastern edge of Snowdonia. The population of the co ...

. The

A470 road The A470 (also named the Cardiff to Glan Conwy Trunk Road) is a trunk road in Wales. It is the country's longest road at and links the capital Cardiff on the south coast to Llandudno on the north coast. While previously one had to navigate th ...

follows the line of the valley, as does the railway line from Blaenau Ffestiniog to

Llandudno Llandudno (, ) is a seaside resort, town and community (Wales), community in Conwy County Borough, Wales, located on the Creuddyn peninsula, which protrudes into the Irish Sea. In the 2021 United Kingdom census, 2021 UK census, the community � ...

, and within the valley there are stations at Roman Bridge,

Dolwyddelan Dolwyddelan ( ; ; ) is a village and Community (Wales), community in Conwy County Borough, Wales. The community occupies most of the valley of the Afon Lledr, and contains the settlements of Dolwyddelan, Pentre Bont, Blaenau Dolwyddelan, and Po ...

, and Pont-y-Pant.

is the main settlement in the valley. The river Lledr, which gives its name to the valley, joins the

River Conwy The River Conwy (; ) is a river in north Wales. From its source to its discharge in Conwy Bay it is long and drains an area of 678 square km. "Conwy" was formerly anglicised as "Conway." The name 'Conwy' derives from the old Welsh words ''c ...

to the south of

Industry

During the Victorian period the valley was renowned for its slate quarries, which were concentrated around Dolwyddelan. These quarries worked the Nod Glas Formation, which extended across Mid and North Wales. It was primarily a bed of soft, black

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

, but in the area of the Dolwyddelan syncline it was partially metamorphised into

slate Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic ro ...

. The principle quarries in the valley were: * Prince Llewellyn quarry and Chwarel Fedw * Chwarel Ddu * Ty'n-y-bryn quarry and Penllyn * Rhiw-goch quarry

References

{{Coord, 53.06, -3.87, type:landmark_region:GB_dim:10000, display=title Valleys of Conwy County Borough