Aonach Beag is a Munro of 1,115.8 m in Highland. On the Munros height ladder it sits between Sgor Gaoith (1,116 m) and Monadh Mor (1,113.4 m).
It is a Munro but not a Marilyn: its 99 m of drop is short of 150 m. It is 250.1 m above the average height of the 427 register hills in Highland. Its nearest higher summit, Geal-charn, is also the hill its key col leads to.