Great Rhos is a Hewitt of 660 m in Powys. It is also on the county tops list, as the highest point of its historic county.
Its closest neighbour in this register, Black Mountain, is 29.4 km away. It counts towards four lists: Hewitts, Nuttalls, Marilyns and county tops. It shares its height of 660 m with Whiteless Pike. On the Hewitts height ladder it sits between Knockowen (660.3 m) and Whiteless Pike (660 m). Its nearest higher summit, Hay Bluff (677 m, 28.0 km south), is a listed top not profiled here. The summit is marked by a trig point.