Wales – Dysynni Valley, Snowdonia
Distance: 19km/12 miles
Type: Hill and valley
Where: Circular walk from Castell y Bere via Llanfihangel-y-pennant, Mynydd Pen-rhiw and Craig yr Aderyn.
Start/End: Castell y Bere car park (SH669086).
Terrain: Hill and valley paths, quiet lanes, several stiles.
Maps: OS Explorer OL23; Landranger 124.
The Dysynni Valley is one of the loveliest areas for walking in the southern half of the Snowdonia National Park. At its head is Cadair Idris, a deservedly popular mountain, which attracts most walkers to this part of the world, leaving the nearby hills much quieter. The Afon Dysynni — into which runs its tributary the Afon Cadair — is a green and tranquil place with a notably flat valley floor and two unusual outcroppings of rock. One of these is capped by the ruins of Castell y Bere, a 13th-century castle. The other is Craig yr Aderyn (Birds’ Rock), a dramatic scenic feature and a wonderful viewpoint. This walk visits them both, as well as the little medieval church at Llanfihangel-y-pennant. Besides Birds’ Rock, there are also excellent views from the hills on the west side of the valley over which this route leads you.
Click below to see a route profile and view the route on an Ordnance Survey map