Mwynhewch y golygfeydd mwyaf trawiadol yn Nyffryn Ogwen Eryri. Gan orchuddio'r fynydd ail uchaf Cymru a Lloegr fel rhan o'r gorwel mawreddog hwn, mae ras Ogwen 25 | Pen yr Helgi Du yn cynnwys llwybrau epig a thir technegol; ras fynydd yw hi mewn gwirionedd. Y Carneddau yw Bryniau Blaen mynyddoedd Eryri, sy’n codi o arfordir Gogledd Cymru i ffurfio
Take in the most spectacular views in Eryri's Ogwen Valley. Covering the second highest mountain in England and Wales as part of this imposing skyline, the Ogwen 25 | Pen yr Helgi Du race includes epic trails and technical terrain; it's truly a mountain race. The Carneddau are the Front Range of the Eryri (Snowdonia) mountains, rising from the Nor
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