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Trichrug round cairns is a prehistoric round cairn located in Wales and protected by Cadw under reference CM327. The monument sits upon bedrock of Pridoli Rocks, undifferentiated mudstone, siltstone and sandstone formed during the Pridoli epoch. Round cairns of this type typically date to the Bronze Age and were constructed as burial monuments, with stones heaped over inhumed or cremated remains. The underlying geology of fine-grained sedimentary rocks would have provided suitable stone for cairn construction, though builders would have sought larger boulders from glacial deposits or field clearance to form the primary structure.
The site's location in the Welsh uplands places it within a landscape rich in Bronze Age settlement and ceremonial activity. Such cairns frequently occupy prominent positions on hillsides or ridgetops, functioning as territorial markers and focal points for communities. The plural form of the monument's name suggests multiple cairn structures survive at this location, representing either separate burial episodes or related ceremonial features constructed within the same locale.
The monument's protection under Cadw reflects its archaeological significance as evidence of prehistoric funerary practice and land use in Wales. Round cairns remain among the most visible surviving monuments from the Bronze Age, offering insights into burial traditions and the organisation of prehistoric Welsh societies.
Trichrug round cairns is a scheduled monument protected by Cadw under reference CM327. View the official record →
Trichrug round cairns is a prehistoric round cairn located in Wales and protected by Cadw under reference CM327.
Trichrug round cairns dates from the prehistoric period, and is classified as a round cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Trichrug round cairns 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 CM327.
Several scheduled monuments lie within 10 km, including Carn Pen-y-Clogau (4.7 km), Beddau'r Derwyddon (5.5 km), Tair Carn Uchaf Cairns (5.6 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Trichrug round cairns'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.
Trichrug round cairns stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.