The collapsed Portal Tomb of Prebaun is situated on the moorland southeast of Prebaun (in Irish, An Preabán; in English, “the Patch”), at the southwestern end of the Ox Mountains, overlooking the valley of the Yellow River, a small tributary of the Moy River (in Irish, An Mhuaidh; in English, “River of the Victory”). It is located near the Foxford Way (in Irish, Bealach Bhéal Easa), northeast of Foxford (in Irish, Béal Easa; in English, “Mouth of the Waterfall”) in County Mayo, Ireland.
Portal Tombs are megalithic structures found in the British Isles, featuring two equally tall upright stones with a doorstone in between, forming the front of a chamber covered by a partially massive capstone.
The northwest-southeast-oriented Portal Tomb consists of an approximately 3.9-meter-long, 2.2-meter-wide, and 0.3-meter-thick capstone, resting on fallen sidewalls and the remains of a portal stone. The complete 2.3-meter-long and the broken 1.6-meter-long portal stones lie on the southwest and northeast sides, adjacent to the capstone.
A possible Court Tomb is located 300 meters northeast of this site.
