Torpantau railway station was a station in the Welsh county of Brecknockshire (now in Powys). It was served by trains on the line from Merthyr to Brecon. It was the highest station on the Brecon and Merthyr Railway. Torpantau is a remote location, though a few passengers may have worked on the local dams, or fished there for leisure. The location was most significant in operational terms for watering engines and tying down brakes before a descent. It is near the (now) Northern Terminus of the narrow gauge Brecon Mountain Railway.