The castle’s history stretches back to at least 1635, when records show it belonged to Ellinor, Viscountess Dillon, widow of Theobold Dillon. By the early 20th century, what remained was described rather modestly as “a large chimney in the remains of a wall”, with the surviving structure measuring roughly 3.5 metres in length and 2.4 metres thick.

The site’s decline accelerated in modern times when a cairn of building rubble, which locals claimed contained brick fragments, was cleared away around 1980. Today, nothing can be seen at ground level, though some architectural fragments that may have originated from the castle are now housed at nearby Bellanagare Castle. Archaeological investigations have attempted to uncover more about the site’s past; testing in 2001 failed to reveal any associated features, whilst further excavations in 2008, conducted about 160 metres to the west-southwest across the stream, similarly produced no related archaeological material.

The castle’s position on this flat landscape beside the river would have offered strategic advantages for its medieval occupants, providing both a water source and views along the river valley. Though the physical structure has vanished, its persistent marking on 19th and early 20th century maps serves as a reminder of the castle’s former significance in the local landscape of Cushlaun, near Bellanagare in County Roscommon.