Satellite Imagery
Satellite Imagery
HER: Highland HER MHG2385 (None)
NMR: ND 17 SW 1 (8571)
SM: 559
NGR: ND 1085 7155
X: 310850 Y: 971550 (OSGB36)
This promontory fort is situated on Holborn Head, precipitous headland girt with sheer cliffs over 30m high and riven with two deep clefts that cut into the cliffs on the SE and across two thirds of the neck on the landward side. Strongly protected by these natural ditches, the artificial defences comprise a thick wall about 145m in length, which forms band of stony debris with occasional facing-stones extending across the full breadth of the promontory on the crest of the slope that rises sharply up behind the clefts; at the foot of this slope in the central sector, on the lip of the seaward cleft, an outer bank about 0.75m high can be seen, though opinion on its character is divided, some investigators omitting it (Mercer 198177, fig 31), others suggesting that it is derived from an internal quarry scoop (Lamb 1980, 73). The entrance is towards the WNW end of the main wall and the interior, which measures about 145m from NW to SE by up to 75m ransversely (0.8ha) and is partly bare rock, is featureless.
Citizen Science: ✗
Reliability of Data: Confirmed
Reliability of Interpretation: Confirmed
X: -393706 Y: 8099297 (EPSG: 3857)
Longitude: -3.53672112488489 Latitude: 58.622773669098784 (EPSG:4326)
Country: Scotland
Current County or Unitary Authority: Highland
Historic County: Caithness
Current Parish/Community/Council/Townland: Thurso
None
| Extant | ✓ |
| Cropmark | ✗ |
| Likely Destroyed | ✗ |
None
| Woodland | ✗ |
| Commercial Forestry Plantation | ✗ |
| Parkland | ✗ |
| Pasture (Grazing) | ✓ |
| Arable | ✗ |
| Scrub/Bracken | ✗ |
| Bare Outcrop | ✗ |
| Heather/Moorland | ✓ |
| Heath | ✗ |
| Built-up | ✗ |
| Coastal Grassland | ✓ |
| Other | ✗ |
None
| Contour Fort | ✗ |
| Partial Contour Fort | ✗ |
| Promontory Fort | ✓ |
| Hillslope Fort | ✗ |
| Level Terrain Fort | ✗ |
| Marsh Fort | ✗ |
| Multiple Enclosure Fort | ✗ |
| Hilltop | ✗ |
| Coastal Promontory | ✓ |
| Inland Promontory | ✗ |
| Valley Bottom | ✗ |
| Knoll/Hillock/Outcrop | ✗ |
| Ridge | ✗ |
| Cliff/Plateau-edge/Scarp | ✗ |
| Hillslope | ✗ |
| Lowland | ✗ |
| Spur | ✗ |
Dominant Topographic Feature: None
| North | ✗ |
| Northeast | ✗ |
| East | ✗ |
| Southeast | ✗ |
| South | ✗ |
| Southwest | ✗ |
| West | ✗ |
| Northwest | ✗ |
| Level | ✓ |
Altitude: 33.0m
N/A
In the absence of excavation, there are neither stratified artefacts nor radiocarbon dates to provide a chronology for the defences.
Reliability: D - None
| Pre 1200BC | ✗ |
| 1200BC - 800BC | ✗ |
| 800BC - 400BC | ✗ |
| 400BC - AD50 | ✗ |
| AD50 - AD400 | ✗ |
| AD400 - AD 800 | ✗ |
| Post AD800 | ✗ |
| Unknown | ✓ |
| Pre Hillfort: | None |
| Post Hillfort: | None |
None
| 1st Identified Map Depiction (1872): | Annotated Camp on the 1st edition OS 25-inch map (Caithness 1877, sheet 5.3) |
| Other (1910): | Description (RCAHMS 1911, 120, no.438) |
| Other (1933): | Scheduled |
| Other (1964): | Visited by the OS |
| Other (1971): | Description and photographs by Raymond Lamb (1980, 73) |
| Other (1972): | visited by the OS |
| Other (1981): | visited by the OS |
| Earthwork Survey (1981): | Plan and description by R J Mercer (1981, 76-8, fig 31) |
| Other (1997): | Visited by the Hill-Fort Study Group |
Featureless
None
| None | ✓ |
| Spring | ✗ |
| Stream | ✗ |
| Pool | ✗ |
| Flush | ✗ |
| Well | ✗ |
| Other | ✗ |
None
| No Known Features | ✓ |
| Round Stone Structures | ✗ |
| Rectangular Stone Structures | ✗ |
| Curvilinear Platforms | ✗ |
| Other Roundhouse Evidence | ✗ |
| Pits | ✗ |
| Quarry Hollows | ✗ |
| Other | ✗ |
None
| No Known Excavation | ✓ |
| Pits | ✗ |
| Postholes | ✗ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Roads/Tracks | ✗ |
| Quarry Hollows | ✗ |
| Other | ✗ |
| Nothing Found | ✗ |
None
| No Known Geophysics | ✓ |
| Pits | ✗ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Roads/Tracks | ✗ |
| Quarry Hollows | ✗ |
| Other | ✗ |
| Nothing Found | ✗ |
None
| No Known Finds | ✓ |
| Pottery | ✗ |
| Metal | ✗ |
| Metalworking | ✗ |
| Human Bones | ✗ |
| Animal Bones | ✗ |
| Lithics | ✗ |
| Environmental | ✗ |
| Other | ✗ |
NO APPARENT FEATURES
| APs Not Checked | ✗ |
| None | ✓ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Pits | ✗ |
| Postholes | ✗ |
| Roads/Tracks | ✗ |
| Other | ✗ |
See main summary
| 1: | None |
| 2: | None |
Guard Chambers: ✗
Chevaux de Frise: ✗
| 1. Simple Gap (South west): | None |
Two ramparts cutting off a spectacular promontory
| Area 1: | 0.8ha. |
| Total: | 0.8ha. |
Total Footprint Area: Noneha.
None
| ✗ | None |
| ✗ | None |
| NE Quadrant: | 0 |
| SE Quadrant: | 0 |
| SW Quadrant: | 2 |
| NW Quadrant: | 0 |
| Total: | 2 |
| Partial Univallate | ✗ |
| Univallate | ✗ |
| Partial Bivallate | ✓ |
| Bivallate | ✗ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
| Unknown | ✗ |
| Partial Univallate | ✗ |
| Univallate | ✗ |
| Partial Bivallate | ✗ |
| Bivallate | ✗ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
None
| None | ✗ |
| Earthen Bank | ✓ |
| Stone Wall | ✓ |
| Rubble | ✗ |
| Wall-walk | ✗ |
| Evidence of Timber | ✗ |
| Vitrification | ✗ |
| Other Burning | ✗ |
| Palisade | ✗ |
| Counter Scarp Bank | ✗ |
| Berm | ✗ |
| Unfinished | ✗ |
| Other | ✗ |
None
| None | ✗ |
| Earthen Bank | ✗ |
| Stone Wall | ✗ |
| Murus Duplex | ✗ |
| Timber-framed | ✗ |
| Timber-laced | ✗ |
| Vitrification | ✗ |
| Other Burning | ✗ |
| Palisade | ✗ |
| Counter Scarp Bank | ✗ |
| Berm | ✗ |
| Unfinished | ✗ |
| No Known Excavation | ✓ |
| Other | ✗ |
| ✗ | None |
| ✗ | None |
Number of Ditches: None
| ✗ | None |
Feachem, R (1963) A guide to prehistoric Scotland. Batsford: London (p 114)
Lamb, R G (1980) Iron Age promontory forts in the Northern Isles. Brit Archaeol Rep, British Ser 79. BAR: Oxford
Mercer, R J (1981) Archaeological field survey in northern Scotland: volume II, 1980-81. University of Edinburgh, Department of Archaeology, Occasional Paper No. 7: Edinburgh
Name Book, Ordnance Survey Object Name Books (6 inch and 1/2500 scale); available https://www.scotlandsplaces.gov.uk/
RCAHMS (1911) The Royal Commission on the Ancient and Historical Monuments and Constructions of Scotland. Third report and inventory of monuments and constructions in the county of Caithness. HMSO, London
Atlas of Hillforts:
Wikidata:
This work is licensed under CC BY-SA 4.0
and should be cited as:
Lock, Gary and Ralston, Ian. 2024. Atlas of Hillforts of Britain and Ireland. Available at: https://hillforts.arch.ox.ac.uk
Document Version 1.1