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Aghnahoo fort is a prehistoric hillfort located near Strabane in County Tyrone, Northern Ireland. The monument occupies a commanding position above the surrounding landscape, with views across the Sperrins. The fort's defences exploit the underlying bedrock of quartzite, part of the Argyll Group formed during the Neoproterozoic, which would have provided a naturally resistant base for construction and a visibly impressive setting. The site's layout suggests it may have served both defensive and ceremonial functions, though its precise chronology remains uncertain. The fort is provisionally identified as a cashel, a characteristic form of enclosed settlement found across Ireland.
The monument is protected by the Historic Environment Division under reference 13925 as a scheduled monument of archaeological importance. Its survival within the contemporary landscape offers evidence of prehistoric settlement patterns in the region and the strategic use of elevated terrain. The hard quartzite bedrock beneath Aghnahoo would have shaped both the building techniques employed and the visual prominence of the fort when viewed from lower ground.
Aghnahoo fort. hillfort & ?cashel is a scheduled monument protected by Department for Communities NI under reference 13925. View the official record →
Aghnahoo fort is a prehistoric hillfort located near Strabane in County Tyrone, Northern Ireland. It is designated a Scheduled Ancient Monument by DfC Northern Ireland (NISMR) under reference 13925.
Aghnahoo fort. hillfort & ?cashel dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Aghnahoo fort. hillfort & ?cashel is a Scheduled Ancient Monument, legally protected by DfC Northern Ireland (NISMR) — the body responsible for designating and safeguarding heritage sites in Ni. The official designation reference is 13925.
Several scheduled monuments lie within 10 km, including Druid's altar. portal tomb (0.6 km), Giant's grave. court tomb (2.2 km), Double stone alignment (3 km).
This page is just one thread. A full Aubrey report pulls together 14 strands of Aghnahoo fort. hillfort & ?cashel'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.
Aghnahoo fort. hillfort & ?cashel stands on Argyll Group, bedrock that formed in the Neoproterozoic. The rock here is quartzite.