Unofficial guide. Not the National Monuments Service, the OPW, Fáilte Ireland or the landowner. Disclaimer
At a glance
- TypeCastle - motte and bailey
Picked out from the Archaeological Survey description below.
Can you visit?
- No source says it is open to the public.Most monuments in Ireland stand on private farmland.
- Ask the landowner before crossing fields, close gates, leave the stones as you find them.Visiting responsibly
History and description
The following description is derived from both the published 'Archaeological Inventory of County Louth' (Dublin: Stationery Office, 1986) and the 'Archaeological Survey of County Louth' (Dublin: Stationery Office, 1991). In certain instances the entries have been revised and updated in the light of recent research.
Full archaeological record 45 words
The following description is derived from both the published 'Archaeological Inventory of County Louth' (Dublin: Stationery Office, 1986) and the 'Archaeological Survey of County Louth' (Dublin: Stationery Office, 1991). In certain instances the entries have been revised and updated in the light of recent research.
References
- Situated on high ground to the S of the River Boyne within the medieval walls of Drogheda and consisting of a high steep mound (H 14.7-16m, max. diam. at base 62.5m, at summit 27.6m) with the remains of a D-shaped bailey (Wth 68m by 50m) at the W. Orpen (1908; fig. on p. 249) illustrates the bailey fosse and the line of part of another one at the SE side of the motte which is now occupied by a roadway. He also illustrates a sub-rectangular lower bailey at the NW but there is no surface evidence of this. The name 'Millmount' (the name applied to the site on the OS 6-inch map) is apparently derived from the fact that there was a windmill erected on the motte in the fifteenth century. This was replaced in 1810 by a Martello tower (IFC Schools MSS vol. 680, 200), the remains of which still stand on the summit of the motte. The bailey is clearly defined on all but the N side by a steep escarpment and is now occupied by a housing development. A wall marking the line of the so-called lower bailey is of modern origin and is hardly part of the original defences as the N side of the D-shaped bailey is likely to have returned onto the NW side of the motte. (Orpen 1908, 246-50; CLAJ 1931, 406; CLAJ 1943, 243-4)
Archaeological Survey of Ireland, National Monuments Service (CC BY 4.0) · Updated 17 July 2007. It describes the site as it was when surveyed.
More castles nearby
Dardistown Castle
Castle - tower house · Dardistown (Duleek Upper By.) · Meath · 5.7 km away
National MonumentTermonfeckin Castle
Castle - tower house · Termonfeckin · Louth · 7.7 km away

Athclare Castle
Castle - tower house · Athclare · Louth · 12 km away
Visitor siteSlane Castle
Castle - unclassified · Slanecastle Demesne · Meath · 14 km away

Smarmore Castle
Castle - tower house · Smarmore · Louth · 18 km away
National MonumentGreenmount Motte
Castle - motte and bailey · Greenmount · Louth · 19 km away
Also recorded nearby
Named sites within 5 km with only a short entry in the Archaeological Survey.
- Calliaghstown WellRitual site - holy well · Calliaghstown (Duleek Lower By.) · 4.7 km · official record
Visitors' notes
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Around Millmount Fort
Other heritage nearby
- St Peter's Church of Ireland, DroghedaAncient church · 0.6 km
- Old Abbey LaneAbbey or friary · 0.6 km
- Magdalen TowerAbbey or friary · 0.7 km
- Dowth MoundMegalithic tomb · 6.1 km
- Saint Bernard's WellHoly well · 6.6 km
- DowthMegalithic tomb · 6.7 km
Recorded within 5 km
- 16 ringfortsArchaeological Survey of Ireland
- 12 ancient churchesArchaeological Survey of Ireland
- 6 abbeys & friariesArchaeological Survey of Ireland
- 6 holy wellsArchaeological Survey of Ireland
- 5 castlesArchaeological Survey of Ireland
- 2 standing stonesArchaeological Survey of Ireland
- 1 promontory fortArchaeological Survey of Ireland
- 1 high crossArchaeological Survey of Ireland
Walks and trails
- Boyne Valley CaminoWalking Trail · 20.5 km · nearest point 0.4 km
- Townley Hall - Balnumber Wood WalkWalking Trail · 1.2 km · nearest point 4.7 km
- Townley Hall - Glen Wood Nature TrailWalking Trail · 1.6 km · nearest point 4.7 km
Outdoors, towns and places to stay
- Townley HallForests · 4.7 km
- LittlewoodForests · 12 km
- MorningtonBeaches · 7.0 km
- Laytown/BettystownBeaches · 7.5 km · Excellent Quality (2025)
- DroghedaWalled towns · 0.5 km
- Brú na Bóinne UNESCO World Heritage SiteUNESCO · 7.5 km
- Collon HouseHistoric stays · 12 km
Other attractions nearby
- Boyne Valley TrailsWalking · 0.4 km
- St Peter's Roman Catholic Church, DroghedaHistoric Houses and Castle · 0.4 km
- St Laurence's Gate - Drogheda WallsHistoric Houses and Castle · 0.5 km
- Magdalene TowerHistoric Houses and Castle · 0.8 km
What's on nearby
- Andy Irvine & Quilty2026-11-06 · 15 km
- Discover the Uilleann Pipes at TSEAC2026-11-07 · 15 km
- The Last Viking2026-11-12 · 15 km
Excavations nearby
- 01E0293 Rathmullan 3, County MeathRoad-scheme excavation report (TII) · 2.3 km
- 00E0914 Lagavooren 7 , County MeathRoad-scheme excavation report (TII) · 2.4 km

