Elidir Fawr

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Elidir Fawr
Elidir Fawr from Mynydd Perfedd with Marchlyn Mawr below
Highest point
Elevation 924 m (3,031 ft)
Prominence 212 m (696 ft)
Parent peak Y Garn
Listing Marilyn, Hewitt, Welsh 3000s, Nuttall
Pronunciation Welsh: [ɛˈlɪdiɾ ˈvawɾ]
Location Gwynedd, UK
Parent range Snowdonia
OS grid SH612613
Topo map OS Landranger 115

Elidir Fawr is a mountain in Snowdonia, north Wales, the northernmost peak in the Glyderau.

To the north of the summit is a small lake, Marchlyn Mawr, which is the upper reservoir for Dinorwig power station, a pump-storage power station hidden inside the mountain. Water from this lake flows through huge tunnels into the lower reservoir Llyn Peris. From the north, Elidir Fawr is very prominent, and can appear to be higher than the higher mountains behind it.

Slate quarries[edit]

From Llanberis, the mountain is dominated by the former Dinorwic slate quarries and the waste they have left behind.


It is a reasonably short, but steep walk up to the summit, and this can be undertaken from the Deiniolen side or from Nant Peris. The Deiniolen walk provides views down to Llanberis, while the Nant Peris approach is short and quite steep.[1] The summit can also be reached from Ogwen Cottage via a traverse of Y Garn and Foel-goch. The route makes its way around the headwall of Cwm Dudodyn to Bwlch y Brecan and up to the rocky summit of Elidir Fawr.

Elidir Fawr from the slopes of Moel Eilio, with the Dinorwic Quarry prominent on its south-west face.
Listed summits of Elidir Fawr
Name Grid ref Height Status
Carnedd y Filiast SH620627 821 m (2,694 ft) Hewitt, Nuttall


  1. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.

External links[edit]

Coordinates: 53°07′51″N 4°04′34″W / 53.13074°N 4.07603°W / 53.13074; -4.07603