The ECN Data Centre

Site Information: Yr Wyddfa/Snowdon

Sponsoring organisation(s)

Cyfoeth Naturiol Cymru - Natural Resources Wales & Llywodraeth Cymru - Welsh Government

Network(s) this site belongs to
UK Environmental Change Network
UK Environmental Change Biodiversity Network

Site characteristics

Min Altitude 298m

Site boundaries are indicated with a black line.
Click map to enlarge.

Max Altitude 1085m
Area of Site 700ha
Mean annual temperature* 7.4oC
Mean annual rainfall* 3784mm
* calculated from the ECN Data Centre database
Information held about this site
View a list of datasets collected at this site
View a list of publications about this site


Yr Wyddfa/Snowdon is an upland ECN site incorporating the summit of Yr Wyddfa or Snowdon, the highest mountain in England and Wales, 19km south-east of Bangor in North Wales. It is co-located with the Nant Teyrn freshwater site. The altitude ranges from 298-1085m and includes three additional summits over 800m. The bedrock is a mixture of Ordovician acidic and basic volcanic rocks, with localised igneous intrusions. Evidence of glaciation is widespread, with prominent corrie moraines. There are 5 lakes within the site, three of which form a 'staircase'. The soils are varied and include brown podzolic soil, gleys, organic peat soils and humic rankers. The dominant vegetation is acidic grassland with Festuca ovina (sheep's fescue) and Agrostis sp (bent grass) in the drier areas and Nardus stricta (mat grass) in the wetter areas. The site is part of the Yr Wyddfa/Snowdon National Nature Reserve, managed by the Natural Resources Wales under agreement with the owner. The land is unenclosed and grazed by sheep and a small herd of feral goats.

Cyfoeth Naturiol Cymru - Natural Resources Wales


Related links

  • Photographic Archive of Yr Wyddfa/Snowdon: Each week a digital photo of Yr Wyddfa/Snowdon is taken and kept in an archive as a record of conditions at the site.



Mr Alex Turner

Cyfoeth Naturiol Cymru - Natural Resources Wales
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

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