Wales
Ceiswyn
544M
1785FT
About Ceiswyn
Tucked away on the southern edge of the Cadair Idris range, this rounded, grassy hill overlooks the historic slate-quarrying village of Corris Uchaf. While it lacks the craggy drama of its loftier northern neighbours, it offers a quiet, lonesome ascent through Nant Ceiswyn with expansive views across the Dulas valley.
Key Statistics
Rank
257th Highest in Wales
Parent Range
Snowdonia
Prominence
?
144.7m
Nearest Town
Corris Uchaf
Geology
You are trekking across the Ceiswyn Formation, made of mudstone and siltstone. These rocks formed from ancient mud that shifted and slumped before hardening into solid ground.
Find It
Latitude
52.6812°N
Longitude
3.8579°W
Did You Know?
- •The hill takes its name from the Afon Ceiswyn, the stream that flows through the valley of Nant Ceiswyn on its eastern flank. In Welsh, 'Ceiswyn' is a traditional personal name, though its application here likely follows the name of the watercourse.
- •From the summit, you gain an excellent perspective of the southern escarpment of the Cadair Idris massif, including the high points of Penygadair and Mynydd Moel, as well as the sharp profile of Maesglase to the east.
- •The slopes above Corris Uchaf are steeped in industrial history; the surrounding area was once a major hub for Welsh slate, and the workings of the Braichgoch quarry are still visible in the valley below.
- •At 544 metres, the summit sits just six metres shy of the 550-metre mark required for several more prominent hill classifications, ensuring it remains blissfully ignored by most peak-baggers.