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The Three Dykes is a linear earthwork monument located in Yorkshire, England, comprising a series of parallel defensive banks and ditches. The monument dates to the Iron Age and represents a significant example of prehistoric boundary or defensive engineering. The earthwork consists of multiple ridges and ditches running across the landscape, reflecting the settlement and territorial organization patterns of Iron Age communities in northern Britain. Such linear dykes served either defensive purposes, marking territorial boundaries, or controlling livestock movement across the landscape during this period.
The Three Dykes (or Five Riggs) is a scheduled monument protected by Historic England under reference 1004911. View the official record →
The Three Dykes is a linear earthwork monument located in Yorkshire, England, comprising a series of parallel defensive banks and ditches. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1004911.
The Three Dykes (or Five Riggs) is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1004911.
Several scheduled monuments lie within 10 km, including Hanging Grimston barrow group: a bowl barrow 650m south west of Thixendale Grange (8.3 km), Hanging Grimston barrow group: three bowl barrows 600m south west of Thixendale Grange (8.6 km), Hanging Grimston barrow group: four bowl barrows and part of a cross dyke 600m SSW of Thixendale Grange (8.7 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of The Three Dykes (or Five Riggs)'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.
The Three Dykes (or Five Riggs) stands on Corallian Group, bedrock that formed in the Oxfordian. The rock here is limestone, sandstone, siltstone and mudstone.