River Dulais
(Redirected from Dulais Valley)
The River Dulais is a river of Glamorgan, and a tributary of the River Neath.
The Dulais has its source on the southern flank of Mynydd y Drum, by Onllwyn in the very north of Glamorgan. From here it swallows many little streams from the mountain and dulty swollen it flows south-westwards past Seven Sisters to carve the Dulais Valley, which conveys the A4019 Aberdulais Road and the railway line.
The river passes Crynant then through open country until it tumbles over the Aberdulais Falls and joins the River Neath at Aberdulais.