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| Elidir Fawr | |
|---|---|
| Name | Elidir Fawr |
| Elevation m | 924 |
| Prominence m | 322 |
| Range | Glyderau |
| Location | Snowdonia, Gwynedd, Wales |
| Grid ref | SH659621 |
| Topo | Ordnance Survey |
Elidir Fawr Elidir Fawr is a mountain in Snowdonia near Glyderau and Llanberis, rising above Llyn Padarn and Idwal Cottage. It forms part of the northern skyline visible from Conwy and Bangor and is noted in Alfred Wainwright-influenced guides and Ordnance Survey mapping. The summit sits within the administrative county of Gwynedd and the conservation remit of Snowdonia National Park Authority.
Elidir Fawr occupies a ridge north of the A5 road and west of Ogwen Valley, dominating views toward Carneddau, Yr Wyddfa and Elidir Fach. Its summit plateau features a trig point and steep crags fall to Cwm Eigiau and Llyn Crafnant, with connecting cols toward Y Garn and Bwlch y Ddeufaen. The mountain's prominence classifies it alongside Hewitt and Nuttall lists popularized by Alan Dawson and John and Anne Nuttall.
Elidir Fawr is underlain by Ordovician and Cambrian volcanic rocks associated with the Llyn y Fan volcanic episode and Rhinog-age tuffs, reflecting uplifts recorded during the Caledonian orogeny and later reshaping in Quaternary glaciations. Periglacial features and glacial cirques link to deposits similar to those around Cwm Idwal and Cadair Idris, showing patterned ground, moraines and crag-and-tail landforms. Geological interest attracts visits from researchers linked to Natural Resources Wales and university departments at Bangor University and Cardiff University.
Common approaches start from car parks at Llyn Padarn near Llanberis, from Tal-y-Bont along the A4244, or from Ogwen Cottage via the A5 corridor. Routes ascend via the Afon Lwyd drainage, scramble up exposed sections near the Bwlch y Ddeufaen pass, or follow established paths used by walkers on Snowdon Horseshoe-style circuits. Path maintenance is coordinated with Snowdonia National Park Authority, volunteer groups such as Conwy Mountain Rescue Team, and organizations like Mountain Training and the British Mountaineering Council.
The mountain lies within a cultural landscape shaped by medieval Welsh princes such as Llywelyn the Great and later landowners of the Penrhyn estate; it is proximate to historic routes used during the Roman Britain period and by drovers on tracks intersecting with the Menai Strait crossing. Elidir Fawr appears in Welsh-language poetry collected in The Mabinogion-era traditions and later antiquarian studies by figures including Thomas Pennant and Edward Llwyd. Industrial-era quarrying and waterworks projects like those at Llyn Celyn and schemes by the Cwm Eigiau dam company affected surrounding slopes and communities such as Bethesda and Abergwyngregyn.
Heathland and montane grassland on Elidir Fawr support species monitored by Natural Resources Wales and conservation NGOs such as RSPB and Plantlife. Birdlife includes red-billed chough analogues recorded in nearby crags, peregrine falcon sightings, and upland passerines similar to populations studied at Ynys Môn and Rhosydd. Flora includes bilberry communities, heather moorland, and rare alpine plants also found on Tryfan and Garnedd Ugain, making the area a focus for Site of Special Scientific Interest assessments and management plans linked to Welsh Government biodiversity policies.
Elidir Fawr is frequented by hillwalkers, scramblers and photographers drawn to views over Conwy Castle, Menai Suspension Bridge, and Cardigan Bay; it features in guidebooks published by AA and route lists by The Guardian and mountaineering periodicals. Nearby amenities in Llanberis and Bethesda provide accommodation associated with operators like Snowdonia Guides and clubs such as Cambrian Mountaineering Club and Rhoscolyn. Events including charity fell races and guided heritage walks are coordinated with Visit Wales and local community councils, contributing to regional outdoor tourism economies alongside attractions like Zip World and the National Slate Museum.