River Neath

River Neath (Afon Nedd)
River
The river at Neath Castle, looking upstream.
Countries	United Kingdom, Wales
Region	South Wales
County	Neath Port Talbot
Tributaries
- left	Melincourt Brook, Clydach Brook
- right	River Dulais, River Clydach
Cities	Pontneddfechan, Glyn-neath, Resolven, Neath
Source
- location	Pontneddfechan, Powys, Wales
Length	30.6 km (19 mi)

River Neath (Welsh: Afon Nedd) is a river in south Wales running south west from its source in the Brecon Beacons National Park to its mouth at Baglan Bay below Briton Ferry on the east side of Swansea Bay.

Several minor rivers rise on the southern slopes of Fforest Fawr. These include the Afon Hepste, Afon Sychryd, Afon Pyrddin, Nedd Fechan and Afon Mellte, the latter two converging at Pontneddfechan to form the River Neath. Upstream from these confluences is the area known as Waterfall Country (Welsh: Coed y Rhaeadr), where the rivers plunge over a series of spectacular cataracts.

The river flows through the Vale of Neath, a long straight valley developed along the Neath Disturbance and which carried a major glacier during the ice ages. Downstream of Pontneddfechan the river has few significant tributaries. Those that do join include the Melincwrt Brook and the Clydach Brook. The only major tributary to join is the River Dulais which has its source north of Seven Sisters. As the Dulais nears the Neath it descends a spectacular waterfall: the Dulais Falls, a popular tourist attraction owned and managed by the National Trust and the site of old iron workings. Close by the river flows past the once grand estate of Ynysygerwn. A smaller tributary, the River Clydach, flows southward through the village of Bryn-coch to join the Neath in Neath town centre.