|To:||Dynevor Arms (SO005073)|
|Length:||3.1 miles (5 km)|
|Meets:||B4275, A4059, A465|
|Route outline (key)|
The B4276 crosses the moors north of Aberdare.
After the bypass, the road crosses the Cynon River and goes under a freight-only railway line in quick succession north of Aberdare. The road then zigzags through Llwydcoed before climbing up onto the moors. It ends on the A465 at a bizarre roundabout junction where through traffic on the A465 has priority over all other movements.
Originally the Dynevor Arms Inn guarded the junction here. That was demolished in the 1960s and replaced by a building that is no longer in use. The National Grid's liquefied natural gas storage facility is adjacent.