|From:||Ciliau Aeron (SN500591)|
|Length:||2.6 miles (4.2 km)|
|Route outline (key)|
The B4339 is a short B-road in central Cardiganshire. It was originally unclassified but gained its number in 1935.
The road starts on the A482 in Ciliau Aeron, in the valley of the River Aeron. The road climbs past the school along a narrow residential road, presently reaching open country. It continues to climb around a few curves and then a flatter (but still uphill) straighter section of road. Eventually the road levels out but then crosses a stream and has to climb again on the far side. Soon Dihewyd is reached. The road ends here at a T-junction on a sharp corner of the B4342, without ever becoming wide enough to need a painted central line.