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Situated in Ballagh Lough, a subrectangular lake (dims c. 250m NW-SE; c. 200m NE-SW) where the MacMahon assented to a Papal Bull ‘at our stronghold of Lochnalach’ in 1297 (Smyth 1954, 3-4). This is a circular grass-covered cairn (diam. 14m; H 0.5m over reduced water level). When the water level was first lowered in 1976 a double ring of piles was noted together with portion of a dug-out canoe (SMR file).
The above description is derived from the published 'Archaeological Inventory of County Monaghan' (Dublin: Stationery Office, 1986). In certain instances the entries have been revised and updated in the light of recent research.
Compiled by: Michael Moore
Date of revision: 22 February 2018
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