Blath Bhalg is a Graham of 640.4 m in Perth and Kinross. All four of its nearest neighbours are higher, up to Beinn a' Ghlo – Carn nan Gabhar at 1,121.9 m.
It sits below Ben Vrackie, only 7.2 km to the west and 201.8 m higher. It is the lowest of the 16 register hills in the Pitlochry to Braemar & Blairgowrie region, where Beinn a' Ghlo – Carn nan Gabhar is highest. On the Grahams height ladder it sits between Beinn Clachach (642.3 m) and Mor Bheinn (640.3 m). Its nearest higher summit, Carn Geal (776.4 m, 5.6 km west), is a listed top not profiled here. It is 249.1 m below the average height of the 62 register hills in Perth and Kinross.
