The Clonin Earthworks, also called the Bull Ring, are a series of earthworks, and a National Monument, located in County Offaly, Ireland.

This barrow is composed of a circular, flat-topped mound enclosed by an inner fosse, surrounded by a fence.

It is circular and roughly 30 metres (33 yd) in diameter.

The stone and earth bank and the inner ditch are quite well preserved, though partially destroyed in the northeast corner.

The top of the mound rises to about 1.5 metres (4.9 ft).