The () is a river in north-west Wales and the second major tributary of the River Conwy. It is about 10 miles or 16 km long, and flows in a generally easterly direction. The has its source on the eastern slopes of , which lies about 3 km NE of . It initially flows in a north-easterly direction towards , where joins it, then flows under the Roman Bridge () and past , where joins it. It continues to the north-east past and then east along the Valley, running parallel to the A470 and the railway line from to . This line has stations in the Valley at Roman Bridge, , and . The river joins the River Conwy to the south of . References Rivers of Conwy County Borough Rivers of Snowdonia