Crib-y-rhiw

Y Llethr is the highest mountain in the Rhinogydd range of Snowdonia, in north Wales. The summit consists of a flat grassy top marked only by a small cairn. The summit is more in keeping with its southern flanks than its rugged northern approach. The shortest route to the summit goes from the valley of Cwm Nantcol in the west, either directly or via Bwlch Drws Ardudwy and over the mountain of Rhinog Fach. To the south lies the mountain of Diffwys, to the south-east lies the mountain of Y Garn, to the north lies Rhinog Fach and to the west lies the hill of Moelfre.

The Rhinogydd (a Welsh plural form, often anglicised as Rhinogs and also known by the alternative Welsh plural Rhinogau) are a range of mountains located east of Harlech in North Wales. The name Rhinogydd derives from the names of two of the more famous peaks, Rhinog Fawr and Rhinog Fach, although the greatest elevation in the range is reached by Y Llethr, 756 m (2,480 feet). Foel Penolau, the northernmost summit of the range, was promoted to a Hewitt in 2018 due to a new survey. The Rhinogydd are notably rocky and heather-clad towards the northern end of the range, especially around Rhinog Fawr, Rhinog Fach and towards Moel Ysgyfarnogod. The southern end, around Y Llethr, Diffwys and the Ysgethin Valley has a softer, grassy character. A population of feral goats are in the range. Over 30 km² are protected as a Special Area of Conservation and a National Nature Reserve.

Rhinog Fach is a mountain in Snowdonia, North Wales and forms part of the Rhinogydd. Technically, Rhinog Fach is a subsidiary summit of Y Llethr, but is a Marilyn. To the north lies its higher cousin Rhinog Fawr, separated by the shapely pass of Bwlch Drws Ardudwy. Although shorter than the highest mountain in the Rhinog range, Y Llethr, it is often regarded as the true 'king of the Rhinogydd' due to its spectacular rocky peak. Unlike Fach, Y Llethr's peak is grassy and unremarkable.

Diffwys is a mountain in Snowdonia, Wales, near Barmouth and forms part of the Rhinogydd. On the north side is an exposure of the Caerdion Syncline. It is technically a subsidiary summit of Y Llethr, missing Marilyn status by 2m. It is therefore a sub Marilyn. The summit has a trig point. To the north is Y Llethr and Crib-y-rhiw, to the east is Y Garn, to the south is Cadair Idris, and to the west is its top Diffwys West Top.

Diffwys West Top is a top of Diffwys in Snowdonia, North Wales, near Barmouth and forms part of the Rhinogydd. It is a grassy summit found on the west ridge. The summit is marked with a pile of stones, below which is the crags of Craig Bodlyn and the glacial lake, Llyn Bodlyn. Moelfre is to the north.

Rhinog Fawr is a mountain in Snowdonia, North Wales and forms part of the Rhinogydd range. It is the third highest summit of the Rhinogydd, losing out to Y Llethr and Diffwys respectively. Its smaller cousin Rhinog Fach lies to the south, separated by the pass of Bwlch Drws Ardudwy, while its other neighbour, Moel Ysgyfarnogod lies to the north. In common with most of the range, the terrain is characterised by hard sedimentary rock covered with heather, making progress on foot difficult. At 510m, nestled in crags, lies Llyn Du, a small tarn beneath the summit. The ascent is most easily made from the north-east or north-west, via the Roman Steps pass.

Cwm Nantcol is a valley in the Ardudwy area of the county of Gwynedd in Wales. It lies in the Rhinogydd range of mountains in Snowdonia and carries the Afon Cwmnantcol. At the head of Cwn Nantcol is the Bwlch Drws Ardudwy pass, from where it is possible to negotiate the summits of Rhinog Fawr and Rhinog Fach.

Dwyfor Meirionnydd is a constituency of the Senedd, first created for the former Assembly's 2007 election. It elects one Member of the Senedd by the first past the post method of election. Also, however, it is one of eight constituencies in the Mid and West Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.

Dwyfor Meirionnydd is a constituency of the House of Commons of the Parliament of the United Kingdom (at Westminster). The seat was created by the Welsh Boundary Commission for the 2010 general election, and replaced the old north Wales seat of Meirionnydd Nant Conwy. Dwyfor Meirionnydd is bordered to the north by Arfon and Aberconwy. The same boundaries were used for the Dwyfor Meirionnydd Welsh Assembly constituency in the 2007 Welsh Assembly election. Like its predecessors, it is a Plaid Cymru stronghold, with their candidate in 2019 achieving a majority of 15.9%. The constituency is to retain its name and gain wards, as part of the 2023 Periodic Review of Westminster constituencies and under the June 2023 final recommendations of the Boundary Commission for Wales for the next United Kingdom general election.

Llyn Cwm Bychan is a lake in north Wales, and is one of the sources of the River Artro which flows south westwards through Llanbedr and onwards to the sea. It is located in the Rhinogydd mountains of Snowdonia.

The River Artro (Welsh: Afon Artro) is a river in Gwynedd, Wales. It is about 4.5 miles (7.2 km) long and has its source at Llyn Cwm Bychan below Rhinog Fawr and Moel Ysgyfarnogod. It flows westwards from its source and is joined by the Afon Cwmnantcol at Pentre Gwynfryn before passing through the centre of Llanbedr where it turns north and passes Pensarn Wharf. The Artro enters the sea at a sizeable tidal estuary between Llandanwg and Mochras/Shell Island. The current estuary was formed following a diversion of the Artro by the Earl of Winchilsea in 1819 to improve access to the wharf at Pensarn which was the shipment point for slate from Llanfair and Llanbedr. Prior to this the Artro entered the sea to the south of Mochras.