Bryntail lead mine is a disused lead mine near Llanidloes in Powys, Wales. Sited on the Afon Clywedog and in the shadow on the Clywedog reservoir damn, it is in the care of Cadw. There were three main shafts, Murray's, Gundry's and Western shaft. The majority of the scheduled buildings on the site are associated with Gundry's shaft, including a barytes mill, two crushing houses, ore bins, roasting ovens and water tanks. On the eastern dressing floor are placements, three buddles, two more ore bins and washing and picking floors. Other mine buildings include the manager's office, smithy, store buildings and a , as well as the miners' footbridge.