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Castell Allt-Goch is a prehistoric hillfort situated in Wales and protected by Cadw under reference CD106. The site occupies a defensive position on bedrock composed of Llandovery rocks—undifferentiated mudstone, siltstone and sandstone deposits that formed during the Llandovery period. This geology provided a firm foundation for the hillfort's construction and would have influenced the quality and workability of the surrounding terrain.
The hillfort follows the typical Iron Age pattern of Welsh hillforts, with defensive earthworks positioned to command the surrounding landscape. The Llandovery bedrock underlying the site, whilst composed of relatively soft sedimentary rocks, would have weathered to create a landscape of mixed terrain—neither providing the dramatic outcrops of harder rock found elsewhere in Wales, nor the completely level ground of lower-lying regions. This intermediate topography would have suited hillfort construction, allowing defenders to exploit natural slopes whilst constructing additional ramparts where necessary.
The monument survives as an important record of prehistoric settlement and defence in Wales. Its protection by Cadw ensures the preservation of both its earthwork remains and the archaeological potential of the site, which continues to contribute to understanding of Iron Age communities and their adaptation to the Welsh landscape.
Castell Allt-Goch is a scheduled monument protected by Cadw under reference CD106. View the official record →
Castell Allt-Goch is a prehistoric hillfort situated in Wales and protected by Cadw under reference CD106.
Castell Allt-Goch dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Castell Allt-Goch is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is CD106.
Several scheduled monuments lie within 10 km, including Lampeter Castle Mound (2.3 km), Lampeter Pillbox (2.7 km), Caer Cadwgan (3.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Castell Allt-Goch's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Castell Allt-Goch stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.