Moelwyn Mawr | |
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Moelwyn Mawr summit ridge
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Highest point | |
Elevation | 770 m (2,530 ft) |
Prominence | 385 m (1,263 ft) |
Parent peak | Moel Siabod |
Listing | Marilyn, Hewitt, Nuttall |
Naming | |
Translation | great white hill (Welsh) |
Pronunciation | Welsh: [ˈmɔilwɨn ˈmaur] |
Geography | |
Location | Gwynedd, Wales |
Parent range | Snowdonia |
OS grid | SH658448 |
Topo map | OS Landranger 124 |
Listed summits of Moelwyn Mawr | ||||
Name | Grid ref | Height | Status | |
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Moelwyn Bach | 710 m (2,329 ft) | Hewitt, Nuttall | ||
Craigysgafn | 689 m (2,260 ft) | sub Hewitt, Nuttall | ||
Moel-yr-hydd | 648 m (2,126 ft) | Hewitt, Nuttall | ||
Moelwyn Mawr North Ridge Top | 640 m (2,100 ft) | Nuttall |
Moelwyn Mawr is a mountain in Snowdonia, North Wales and forms part of the Moelwynion. From its summit, which directly overlooks the Vale of Ffestiniog, it affords spectacular views in all directions.
In 1990, Moelwyn Mawr was designated a Site of Special Scientific Interest of national scientific importance. The glaciated landscape of the mountain provides fine examples of two specific features. On the north-east flank of the mountain is a terrain of patterned ground, consisting of small-scale vegetated stripes. On the west side, a debris tongue formed by a rock glacier extends into Cwm Croesor.
Slate quarrying was a major industry for many years in the Moelwynion. Moelwyn Mawr's flanks have several major quarries on them. To the west is Croesor Quarry perched high above Cwm Croesor. To the north west is Rhosydd Quarry on the col between Cwm Croesor and Cwm Orthin. Within Cwm Orthin, Conglog and Wrysgan quarries are located on the north slope of the mountain. Within Cwm Ystradau to the east lies Moelwyn Slate Quarry.
A popular hike combines both Moelwyn Mawr and Moelwyn Bach via the Craigysgafn ridge.
A steep climb to the summit (which has a trig point) allow views of areas that cannot be seen without climbing.
Moelwyn Mawr has a high reservoir, Llyn Stwlan, which is part of the Ffestiniog Power Station pumped-storage hydroelectric power plant in Tanygrisiau.