|From:||Clawdd Poncen (SJ070446)|
|Length:||22 miles (35.4 km)|
|Met (1923):||A494, A542, A525, A541, A550, A549|
|Now part of:||A5104|
|Route outline (key)|
The B5104 was a long B-road in North Wales.
The road started on the A494 at Clawdd Poncen, to the north of Corwen on the A5. It then headed northeastwards along the valleys of the Rivers Morwynion and Alyn to Pen-y-stryt, where it crossed the A525.
The road then climbed into the hills, reaching a height of over 1100 feet, before reaching the River Alyn again (which takes a much longer route around the hills via Mold). After going through Penyffordd the road ended on the western edge of Broughton on the A549.
The B5104 was upgraded to Class I status in 1935 but kept its number so it became the A5104. There have been a few reroutings since then (such as the Penyffordd bypass) but the current A5104 is essentially the same road.