driving road

B4391 Berwyn Mountain Pass

North Wales's best-kept driving secret, threading through Powys, Denbighshire and Gwynedd with sweeping bends, technical hillclimbs, tight hairpins, and vast open moorland panoramas from Llanfyllin to Blaenau Ffestiniog.

WhereLlangynog, Powys, United Kingdom · Wales

RoadB4391 Berwyn Mountains

RouteLlanfyllin → Blaenau Ffestiniog

Distance40 miles · 64 km · ~1h 26m drive

Charactermountain, scenic, technical, moorland, B-road

OpeningOpen year-round; quieter than better-known Welsh routes

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