Afon Twymyn

Afon Twymyn rises in the hills about five miles north-east of Bumlumon in Powys. It winds through a steep-sided valley where old lead-workings at Dylife still mark the slopes. After passing under Dolgadfan Bridge the river turns north and meets the Afon Iaen near Llanbrynmair. The junction of the two rivers holds the grassy mound of Castell Tafolwern, known locally as Yr Hen Domen. From here the Twymyn swings west and, half a mile north of Lantwymyn, it joins the Afon Dyfi. Visitors can follow the river’s course through quiet farmland and woodland. At Dylife the remains of the lead mines lie beside the water, while the old bridge at Dolgadfan frames the view. Near Llanbrynmair the riverside path leads to the ruined castle mound, offering a quiet spot to stand between the converging waters.