The River Aled, a small river near Conwy County Borough, flows into River Elwy.

The river originates at Llyn Aled on Mynydd Hiraethog to the right of the village Llansannan. It flows through Llyn Aled Isaf and then towards the north through Llansannan and Bryn Rhyd-yr-arian before meeting River Elwy to the east of village Llanfair Talhaearn.