Rathdooney Beg, in Ballymote County Sligo, is a small barrow cemetery consisting of three monuments and sited prominently on the summit of a drumlin ridge.

Many passage tombs and hilltop cairns are visible form the top of Rathdooney Beg, with the largest site being enclosed by a wide fosse, or trench.

Excavation has indicated that it was built during the early Neolithic period, between 3930-3520 BC. North of this is a smaller bowl barrow of similar form enclosed by a fosse and external earthen bank.

The third barrow is a saucer barrow and is attached to the smaller bowl barrow in its western side and is enclosed by a penannular, or crescent shaped ditch and external bank. Excavation was carried out here in 1994 and 1995 and shows that the two barrows were constructed in the Iron Age.