Mynydd Troed is a Marilyn of 609 m in Powys. All four of its nearest neighbours are higher, up to Pen y Fan at 886 m.
It sits below Waun Fach, only 5.0 km to the east and 202 m higher. Only one of the 56 hills profiled in Wales is lower. It shares its height of 609 m with Ben Aslak and High Seat. It is the lowest of the ten register hills in the Llandovery to Monmouth region, where Pen y Fan is highest. On the Marilyns height ladder it sits between Corwharn (609.1 m) and Ben Aslak (609 m). Its nearest higher summit, Mynydd Llysiau (662 m, 4.3 km east), is a listed top not profiled here. The summit is marked by a trig point.