The River Rhaeadr () is a river in Powys, Wales.
It starts at the Pistyll Rhaeadr waterfall a few miles from the village of Llanrhaeadr-ym-Mochnant, where the Afon Disgynfa falls over a 240-foot (73 m) cliff-face, after which the river is known as the Afon Rhaeadr.
Downstream, the Afon Rhaeadr runs into the Afon Tanat.
See also
River Wye (Afon Gwy)
External links Photos of the River Rhaeadr on geograph.org.uk