Beenalaght, Megalithic stone alignment in County Cork, Ireland.

Beenalaght, also called An Seisear ("The Six"), is a Bronze Age stone row about 11.1 m long on the flat pasture of Reanthesure hill west of Bweeng, County Cork. Its six stones stand 1.8 to 2.9 m tall, the tallest at the two ends, and one stone has fallen.

Beenalaght is a Bronze Age stone row, one of roughly 80 such rows of three to six stones recorded in south-west Ireland. It stands in the townland of Beenalaght, whose Irish name Binn na Leacht means "peak of the burial mound", on the hill of Reanthesure west of Bweeng.

The row is known as An Seisear, Irish for "the six", and also as The Six or The Sure in English. The townland name Beenalaght comes from Binn na Leacht, "peak of the burial mound". The stones stand on the hill of Reanthesure in the townland of Beenalaght, west of Bweeng.

The site can be reached by driving southwest from Mallow toward Bweeng village using local roads. The stones sit in open ground that you can walk to, so be prepared for uneven earth and exposed weather conditions.

The row is one of roughly 80 stone rows of three to six stones recorded in south-west Ireland. The tallest stones stand at the two ends of the 11.1 m line, and the nearby Gowlane North stone circle lies within walking distance of the pasture.