Tullich Hill is a Graham of 633.1 m in Argyll and Bute. All four of its nearest neighbours are higher, up to Doune Hill at 734.5 m.
It is the lowest of the eight register hills in the Loch Long to Loch Lomond region, where Doune Hill is highest. On the Grahams height ladder it sits between Glas-charn (633.3 m) and Cruinn a' Bheinn (632.5 m). Its nearest higher summit, Ben Reoch (660.3 m, 2.1 km north-east), is a listed top not profiled here.