Black Mountain is a Hewitt of 703.6 m in Herefordshire, Powys. Its drop clears the 150 m Marilyn standard by only 5 m.
It is also on the county tops list, as the highest point of its historic county. It counts towards four lists: Hewitts, Nuttalls, Marilyns and county tops. It sits below Waun Fach, only 6.7 km to the south-west and 107.4 m higher. All four of its nearest neighbours lie to the south, so it stands at the northern edge of its group. Its nearest higher summit, Rhos Dirion (713.4 m, 4.8 km south-west), is a listed top not profiled here. The highest point is recorded as no feature 12m w of path, not a cairn.