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Llyn Trawsfynydd

Llyn Trawsfynydd


The village of Trawsfynydd is off the A470 to the north Dolgellau and south of Blaenau Ffestiniog; it has a population of just under 1000.

The village is close to Llyn Trawsfynydd, a large man-made reservoir, which was originally built between 1924 and 1928 to supply water for Maentwrog hydro-electric power station. The lake was subsequently also utilized for the supply of cooling water to the twin reactor Trawsfynydd nuclear power station. Designed by the Scottish architect Sir Basil Spence, construction began in July 1959 and both of the reactors were in operation by March 1965, with the station opening fully in October 1968. Both reactors have been shut down since 1991; the site is in the process of being decommissioned.


Tourist Information Centre


Blaenau Ffestiniog,
LL41 4UB


Plan route to Trawsfynydd using Google mapsPlan route using Google maps

Map reference: SH 707356  Lat: 52.90256 Long: -3.92311

Travel north from Dolgellau on the A470; after passing the junction with the A4212 Bala road on your right, turn next left for the village.

Accessible by Public Transport: 10 miles from Blaenau Ffestiniog station