Corwharn is a Graham of 609.1 m in Angus. Its drop clears the 150 m Marilyn standard by only 2.5 m.
All four of its nearest neighbours are higher, up to Driesh at 947.6 m. Only 11 of the 737 hills profiled in Scotland are lower. It shares its height of 609.1 m with Ladylea Hill. It is the lowest of the 21 register hills in the Braemar to Montrose region, where Lochnagar – Cac Carn Beag is highest. On the Grahams height ladder it sits between Creag Dhubh Mhor (611 m) and Ladylea Hill (609.1 m). Its nearest higher summit, The High Tree (609.6 m, 4.9 km north-west), is a listed top not profiled here. It is 211.1 m below the average height of the 10 register hills in Angus.