|Length:||18.7 miles (30.1 km)|
|Meets:||A40, A487, A40, B4313, A487|
|Old route now:||B4332|
|Route outline (key)|
The B4329 is a long rural B-road in western Pembrokeshire.
It starts in Haverfordwest at a roundabout on the A40 and A487. It heads north out of town and crosses the A40 bypass at another roundabout. The road continues northeast through Crundale before going over the Fishguard Branch Line. A couple of miles further on it enters the Pembrokeshire Coast National Park.
The rpad crosses the B4313 at a crossroads at New Inn (the other road has priority) before climbing into the Mynydd Preseli range. It reaches a summit of over 1300 feet by a small car park near Cerrig Lladron before descending once more to Brynberian. It crosses the Afon Nyfer at a very narrow (and longer than expected) bridge before reaching the A487 to the west of Eglwyswrw half a mile later.
This is the original and present eastern end of the B4329. However, in the late 1920s the road was extended via a short multiplex along the A487 east along a formerly unclassified road via Llanfair-Nant-Gwyn to end on the B4332 at Boncath. This extension was renumbered B4332 in 1935, cutting the B4329 back to its original route.