LiDAR 1m DTM Hillshade
Satellite Imagery
LiDAR 1m DTM Hillshade
Satellite Imagery
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HER: Clwyd Powys 905 (None)
NMR: SN 98 NW 1 (304942)
SM: None
NGR: SN9054088990
X: 290540 Y: 288990 (OSGB36)
Large, prominent, partial contour hillfort occupying the summit and N flank of Dinas hill overlooking the Llyn Clewedog reservoir (formerly the valley of the Afon Clywedog, where it was sited within a loop of the river). Unusual site considering it's large size amongst much smaller Mid Wales sites, Steep to very steep surrounding slopes. Measures c. 500m NE-SW by 160m, with internal area c. 12ha. The bank and ditch discontinuous and use is made of the very steep slopes on SE. Detached bank and ditch forming a main approach to the N, but entrance not defined. Spurgeon (1972) suggests that it may be unfinished. Improved upland pasture. On 1st Ed. OS map (1886). Minimal investigations, undated.
Citizen Science: ✗
Reliability of Data: Confirmed
Reliability of Interpretation: Confirmed
X: -402254 Y: 6888808 (EPSG: 3857)
Longitude: -3.6135130221446037 Latitude: 52.48778322983276 (EPSG:4326)
Country: Wales
Current County or Unitary Authority: Powys
Historic County: Montgomeryshire
Current Parish/Community/Council/Townland: Trefeglwys
Bank and ditch discontinuous.
| Extant | ✓ |
| Cropmark | ✗ |
| Likely Destroyed | ✗ |
Improved upland pasture
| Woodland | ✗ |
| Commercial Forestry Plantation | ✗ |
| Parkland | ✗ |
| Pasture (Grazing) | ✓ |
| Arable | ✗ |
| Scrub/Bracken | ✗ |
| Bare Outcrop | ✗ |
| Heather/Moorland | ✗ |
| Heath | ✗ |
| Built-up | ✗ |
| Coastal Grassland | ✗ |
| Other | ✗ |
Large, prominent, partial contour hillfort occupying the summit and N flank of Dinas hill overlooking the Llyn Clewedog reservoir (formerly the valley of the Afon Clywedog, where it was sited within a loop of the river). Unusual site considering it large size amongst much smaller Mid Wales sites, Steep surrounding slopes.
| 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: Hill top
| North | ✗ |
| Northeast | ✗ |
| East | ✗ |
| Southeast | ✗ |
| South | ✗ |
| Southwest | ✗ |
| West | ✗ |
| Northwest | ✓ |
| Level | ✗ |
Altitude: 410.0m
N/A
None. Suggested as Neolithic causewayed enclosure in past but unlikely.
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 |
On 1st Ed. OS map (1886). CPAT Montgomeryshire Small enclosures project 1990-97.
| 1st Identified Map Depiction (1886): | OS map. |
| Other (None): | CPAT Montgomeryshire Small enclosures project. |
None.
Stream 0.2km outside fort.
| 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 | ✗ |
None
| APs Not Checked | ✓ |
| None | ✗ |
| Roundhouses | ✗ |
| Rectangular Structures | ✗ |
| Pits | ✗ |
| Postholes | ✗ |
| Roads/Tracks | ✗ |
| Other | ✗ |
Detached bank and ditch forming a possible main approach to the N, but entrance not defined
| 0: | None |
| 2: | None |
Guard Chambers: ✗
Chevaux de Frise: ✗
The bank and ditch discontinuous and use is made of the very steep slopes on SE.
| Area 1: | 12.0ha. |
| Total: | 12.0ha. |
Total Footprint Area: Noneha.
None
| ✗ | None |
| ✗ | Banks discontinuous. Rests on very steep slopes on SE. |
| NE Quadrant: | 1 |
| SE Quadrant: | 0 |
| SW Quadrant: | 1 |
| NW Quadrant: | 1 |
| Total: | 1 |
| Partial Univallate | ✓ |
| Univallate | ✗ |
| Partial Bivallate | ✗ |
| Bivallate | ✗ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
| Unknown | ✗ |
| Partial Univallate | ✗ |
| Univallate | ✗ |
| Partial Bivallate | ✗ |
| Bivallate | ✗ |
| Partial Multivallate | ✗ |
| Multivallate | ✗ |
Spurgeon (1972) suggests that it may be unfinished.
| 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 |
| ✓ | Discontinuous ditch. |
Number of Ditches: 1
| ✗ | None |
Musson, C. 2012. Montgomeryshire hillforts and enclosures from the air, in Britnell, W.J. and Silvester, R.J. (eds) Reflections on the past. Essays in honour of Frances Lynch. Cambrian Archaeological Association, 351-368.
Royal Commission on the Ancient and Historical Monuments and Constructions in Wales and Monmouthshire, 1911. An Inventory of the Ancient Monuments in Wales and Monmouthshire, I, County of Montgomery, No 929, London: HMSO.
Silvester, R.J. and Britnell, W.J. 1993. Montgomeryshire small enclosures project. Summary Report 1993, CPAT Report No 80, Welshpool, Clwyd-Powys Archaeological Trust.
Spurgeon, C.J. 1972. Enclosures of Iron Age type in the Upper Severn Basin, In Lynch, F. and Burgess, C. (eds.) 1972, Prehistoric man in Wales and the West, 338, 43, Bath: Adams and Dart.
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