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Arran, Lochranza, Torr An T' Sean Chaisteal

Fort (Prehistoric)

Site Name Arran, Lochranza, Torr An T' Sean Chaisteal

Classification Fort (Prehistoric)

Alternative Name(s) Coillemore Burn

Canmore ID 39808

Site Number NR95SW 2

NGR NR 9277 5029

Datum OSGB36 - NGR


Ordnance Survey licence number AC0000807262. All rights reserved.
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Administrative Areas

  • Council North Ayrshire
  • Parish Kilmory
  • Former Region Strathclyde
  • Former District Cunninghame
  • Former County Buteshire

Archaeology Notes (1977)

NR95SW 2 9277 5029.

(NR 9277 5029) Torr an t-Sean Chaisteil (Fort) (NR)

OS 6" map (1924)

Balfour describes an oval fort, 231 x 117ft on Torr an t-Sean Chaisteil. He adds that it is not possible to obtain an estimate of the original height and thickness of the walls, but the debris indicates they were probably unimportant. McLellan, however, considers that the evidence has been misinterpreted by Balfour and describes the fort as defended by a broad crescentic wall about 107 yds long around the vulnerable side of the summit, the other side being sufficiently precipitous as to form a natural defence. Towards the W end of the crescentic wall, composed of large blocks lying in confusion, a narrow wall runs out along the flat bog to the SSE. This is obviously not part of the original structure, and would seem to be of much later date, perhaps a cattle enclosure. There are the ruins of a small rectangular building, possibly a shieling, towards the E end of the crescentic wall.

Source: J Balfour 1910; R McLellan 1970

The ill-defined remains of a fort occupy the summit of a rocky steep-sided knoll above Lochranza Bay. There is a 90.0m long wall, surviving as a 3.5m wide band of large stones, around the easily approached south side of the knoll. This curves round northwards at each end to almost meet the natural slopes on the north side and although there is no entrance visible it was probably at one end of this wall.

The name Torr an t-Sean Chaisteil could not be confirmed locally. Surveyed at 1:2500.

Visited by OS (BS) 7 December 1977


Note (30 October 2014 - 23 May 2016)

This fort, which occupies the summit of a steep-sided hillock overlooking Lochranza is oval on plan, measuring about 70m from ENE to WSW by 35m transversely (0.2ha) within a single wall reduced to a band of stones about 3.5m thick around its S margin. No entrance is visible and it probably lies at the junction between the wall and the undefended N flank of the hillock on the E or W. The interior is featureless.

Information from An Atlas of Hillforts of Great Britain and Ireland – 23 May 2016. Atlas of Hillforts SC2470

Note (26 June 2018)

The location, classification and period of this site have been reviewed.

HES Survey and Recording 26 June 2018


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