 This corrie drains down Gleann Cailliche (Glen of the Old Woman) into Loch Lyon, this now deserted glen was previously well populated before the Highland Clearances.The remains of the settlement of Tigh na Cailleach and the surrounding shielings can still be identified
.All drainage from this side of the mountain finds it way to the Firth of Tay on the east coast via Loch Lyon, Loch Tay and the River Tay

Beinn Achaladair’s other significant corrie is Corrie Achaladair which stands to the south of the mountain and forms a col with the adjoining Munro of Beinn an Dotaidh.