Rathcroghan, Archaeological site in Tulsk, County Roscommon, Ireland

Rathcroghan is a complex of over 240 archaeological monuments near Tulsk in County Roscommon. Its focal point is the Rathcroghan Mound, a broad, flat-topped circular mound 89 metres across and 5.5 metres high, with gently sloping ramps to the east and west. The surrounding landscape holds ringforts, linear earthworks and enclosures.

The area began during the Neolithic period and continued as a ceremonial and political site for thousands of years. Further construction and reshaping took place during the Bronze Age and Iron Age, when it became the seat of a regional kingdom.

The cave of Oweynagat features ogham inscriptions and holds connections to Queen Medb, the Battle Goddess Mórrígan, and the origins of Samhain festival.

The visitor center in Tulsk offers guided tours that explain the site and its different monuments. Walking routes are mostly flat and cross open pasture, so sturdy footwear helps during wet conditions.

The Rathcroghan Mound measures 89 meters in diameter and sits atop an earlier monument constructed with two concentric stone-built ring banks.