Unofficial guide. Not the National Monuments Service, the OPW, Fáilte Ireland or the landowner. Disclaimer
At a glance
- TypeCastle - tower house
- Date or period mentioned15th-century
- StatusNational Monument
What to look for
- Machicolation
- Bawn wall
- Vaulted floor
- Corbels
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
Situated on bedrock on the shoreline, at the SE end of Achill Island, overlooking Achill Sound.
Full archaeological record 253 words
Situated on bedrock on the shoreline, at the SE end of Achill Island, overlooking Achill Sound.
Kildavnet Castle consists of a four storey tower house of late 15th-century date. It is rectangular in plan (6.93m WNW-ESE; 5.57m NNE-SSW), with base batter, and is constructed of roughly coarsed limestones, sandstones, granites and conglomorates (Wall T. 1.7m). The original entrance, now broken out, is at the W end of the N wall. Immediately inside are drawbar sockets. A straight flight of stairs in the thickness of the W wall gave access to the first floor, which was wooden and carried on corbels. Above this, is a stone-built, vaulted ceiling. An opening in this stone ceiling, accessed by a ladder, gave onto the second floor, where a short flight of stone stairs leads to the upper floors, which were wooden, and the battlements. The windows, with the exception of two round-headed slit windows in the upper floors, are plain rectangular windows. There is a gardrobe chute at W end of S wall. The battlements carry projecting machicolations on the S, W and N sides, but not on the E, seaward side. Remnants of a bawn wall (MA065-025001-), with angle tower, can be seen1.6m out from the walls of the tower house at WNW and NNE sides.
The castle is traditionally associated with Grace O’Malley or Granuaile (c. 1530-1603), but the architectural detail suggests that it was built before her time, most likely by an O’Malley ancestor.
This is a National Monument in State ownership (No. 458).
References
- This monument is subject to a preservation order made under the National Monuments Acts 1930 to 2014 (PO no. 185/1949).
Archaeological Survey of Ireland, National Monuments Service (CC BY 4.0) · Compiled by Jane O'Shaughnessy · Updated 18 June 2018. It describes the site as it was when surveyed.
Folklore and traditions
The castle is traditionally associated with Grace O’Malley or Granuaile (c. 1530-1603), but the architectural detail suggests that it was built before her time, most likely by an O’Malley ancestor.
More castles nearby
National MonumentGranuaile's Castle
Castle - tower house · Glen · Mayo · 9.0 km away
Visitor site National MonumentRockfleet Castle
Castle - tower house · Rockfleet · Mayo · 21 km away
Visitor siteWestport Estate
Castle - unclassified · Westport Demesne (Murrisk By.) · Mayo · 28 km away
Also recorded nearby
Named sites within 5 km with only a short entry in the Archaeological Survey.
- ToberdavnetRitual site - holy well · Cill Damhnait · 0.3 km · official record
- Doonaglas FortPromontory fort - coastal · An Cheathrú Gharbh · 1.5 km · official record
Visitors' notes
Badges are opinions of visitors - not verified facts. One vote per badge and visitor; no account needed.
Best time to visit
What's missing on this page?
Share a tip to find it
Share a local tradition or story
Suggest a correction
Suggest the right map location
Report a duplicate page
Ask a question
Do not include personal data. See our privacy notice.
Around Carrickkildavnet Castle
Other heritage nearby
- ToberfelabrideHoly well · 8.1 km
Recorded within 5 km
- 9 promontory fortsArchaeological Survey of Ireland
- 3 ancient churchesArchaeological Survey of Ireland
- 1 holy wellArchaeological Survey of Ireland
- 1 ringfortArchaeological Survey of Ireland
Walks and trails
- Achill Cycle Hub - Loop 1Road Cycling Trail · 43.2 km · nearest point 0.1 km
- Lough Ard Walk - CurraneWalking Trail · 6.5 km · nearest point 1.5 km
- Slí Grainne MhaolWalking Trail · 6.2 km · nearest point 1.5 km
Outdoors, towns and places to stay
- Dooega Beach, Achill IslandBeaches · 6.6 km · Excellent Quality (2025)
- Clare Island, LouisburghBeaches · 8.9 km · Excellent Quality (2025)
- Oldhead Wood Nature ReserveNature reserves · 16 km
Other attractions nearby
- Cuan na hAisléime (Ashleam Bay)Natural Landscape · 3.9 km
- Spanish Armada ViewpointBeach · 5.3 km
- Dooega Beach, Achill IslandBeach · 6.7 km
- Dumhach Bheag (Dooghbeg)Natural Landscape · 7.7 km
What's on nearby
- Circus Science By The Sea Festival2026-11-13 · 10 km
- Circus Science By The Sea Festival2026-11-14 · 10 km
- Circus Science By The Sea Festival2026-11-15 · 10 km


