Bwlch Penbarras

The gap, which is at an altitude of 360 m (1,180 ft), lies between the hills of Moel Famau and Foel Fenlli.

Offa's Dyke Path, running broadly south–north, crosses the road at its highest point.

The alternative name of Old Bwlch references its position on the historic route between Mold and Ruthin via Llanbedr Dyffryn Clwyd.

It was superseded by the 18th-century Mold to Denbigh turnpike (now the A494 road), which crosses the Clwydian range several miles to the south, at Bwlch-y-Parc.

Cycling Weekly magazine has featured it as a 'Killer Climb', and also listed it in the Dave Lloyd Mega Challenge cyclosportive.