|To:||Ffairfach (W) (SN619210)|
|Distance:||13.2 miles (21.2 km)|
|Meets:||A40, A484, B4310, B4297, A476|
|Route outline (key)|
The B4300 is a minor road in Carmarthenshire. Except for the western end which was originally part of the A475 (renumbered A48 in 1935) the road was originally unclassified but gained its number in 1935.
It leaves the A40 and A484 at a roundabout on the Carmarthen bypass and heads eastwards, running upstream along the left bank of the River Towy for its entire length. At Tregynwr, on the eastern edge of Carmarthen town, the road TOTSOs left at what was its original western end and quickly enters open country. The route tends to stay in the valley bottom, not too close to the river, but occasionally is forced to climb slightly.
In the area of Capel Dewi the Towy meanders north and so the B4300 goes over a spur and through the village to maintain its easterly route. Before returning to the valley bottom the B4310 comes in from the right and multiplexes with us for a short distance before leaving again to the left. The river again detours north and the road passes through a wood and then the village of Llanarthne to meet the B4297. Dryslwyn Castle, which that road passes, is clearly visible as more-or-less the only hill in the flat river valley. Again there's a short multiplex before the B4297 turns off again to the right.
The road continues east, passing through no further places of any size. Again the river detours to the north before the B4300 bears sharply right to end at a T-junction on the A476 to the west of Ffairfach.