The Upper Clydach River runs from a poorly drained area south of

Cwmgors Cwmgors is a village in the county of Glamorgan, and administered as part of the unitary authority borough of Neath Port Talbot, Wales. It is part of the community of Gwaun-cae-Gurwen and lies within the ceremonial county of West Glamorgan. Cw ...

and flows south and southeast through Cwm Gors for about 7 km to join the

River Tawe The River Tawe (; cy, Afon Tawe ) is a long river in South Wales. Its headwaters flow initially east from its source below Llyn y Fan Fawr south of Moel Feity in the Black Mountains, the westernmost range of the Brecon Beacons National Pa ...

Pontardawe Pontardawe () is a town and a community in the Swansea Valley (Welsh: ''Cwmtawe'') in Wales. With a population of 6,832, it comprises the electoral wards of Pontardawe and Trebanos. A town council is elected. Pontardawe forms part of the county bo ...

- . Each of the rivers bearing the name 'Clydach' in South Wales is thought to derive from an earlier Celtic word 'klou' or 'kleu' together with the suffix '-ach' which is of Irish origin. The sense is of a 'strong-flowing', 'washing' or stony river.

References

External links

Geograph - waterfall on Upper Clydach River
Rivers of Neath Port Talbot {{Wales-river-stub