| Elidir Fawr | |
|---|---|
 Elidir Fawr fromMynydd Perfedd withMarchlyn 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,Furth |
| Naming | |
| Pronunciation | Welsh:[ɛˈlɪdɪrˈvau̯r] |
| Geography | |
 | |
| Location | Gwynedd,Wales |
| Parent range | Snowdonia |
| OS grid | SH612613 |
| Topo map | OSLandranger 115 |
Elidir Fawr is amountain inSnowdonia, northWales, the northernmost peak in theGlyderau. Its name means 'Big Elidir', named after a legendary warrior king of the 6th century also known as Eliffer Gosgorddfawr (Elidir of the Great Army).[1]
To the north of the summit is a small lake,Marchlyn Mawr, which is the upperreservoir forDinorwig power station, apump-storagepower station hidden inside the mountain. Water from this lake flows through huge tunnels into the lower reservoirLlyn Peris. From the north, Elidir Fawr is very prominent, and can appear to be higher than the higher mountains behind it.
FromLlanberis, the mountain is dominated by the formerDinorwic 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 theDeiniolen side or fromNant Peris. The Deiniolen walk provides views down to Llanberis, while the Nant Peris approach is short and quite steep.[2] The summit can also be reached from Ogwen Cottage via a traverse ofY Garn andFoel-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.
| Name | Grid ref | Height | Status |
|---|---|---|---|
| Carnedd y Filiast | SH565469 | 821 m (2,694 ft) | Hewitt,Nuttall |
| Elidir Fach | SH6061 | 795 m (2,608 ft) | Unclassified |
53°07′51″N4°04′34″W / 53.13074°N 4.07603°W /53.13074; -4.07603