Milltir Cerrig
B4391Bala to Llangynog · Gwynedd / Powys (Berwyn)
Distance8.4mi · 13.5 km
Drive time17 minon the road
DifficultyModerate
MoorlandMountainValley
Lonely B-road crossing of the Berwyn range between Bala and Llangynog.
The B4391 crosses Milltir Cerrig over the Berwyn mountains at about 486m, running between the B4402 junction near Bala and the village of Llangynog at the head of the Tanat Valley. It is a quiet, exhilarating drive: open moorland sweepers on the long northern shoulder, then a steeper, tighter four-mile descent into Llangynog. The road brushes the edge of the Eryri (Snowdonia) National Park. Mind sheep and stock straying onto open moorland sections, the steeper bends and gradient on the Tanat descent, and bleak weather with fog on the summit.
Where it runs
BalaStart · Gwynedd / Powys (Berwyn)
LlangynogEnd · Wales
Character
Corners24bends
Tightness5of 10
Max gradient14%≈ 1-in-7
Hairpins0tight bends
Climb301 mtotal ascent
Summit499 mhighest point · 1637 ft
SpringSummerAutumn
Elevation
337 m rangeKnow before you go
- Straying sheep
- Steep Tanat descent
- Summit fog
Sources
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