A cashel is simply a ringfort built from dry-stone rather than banked earth, a distinction that reflects both local geology and the preferences of whoever commissioned it, likely during the early medieval period, roughly between the fifth and twelfth centuries. These circular enclosures served as farmsteads and homesteads for farming families of varying social rank, the scale and solidity of the construction offering some indication of the owner's standing in a society where cattle wealth and land were closely bound together.

The specific history of this particular cashel in Greyford remains difficult to reconstruct in detail. What can be said is that cashels of this type are concentrated in areas where stone is readily available at the surface, and Galway's geology, much of it limestone karst, lends itself to exactly that kind of construction. The townland name Greyford itself suggests a crossing point, possibly over a small river or stream, which would have made the surrounding land practically valuable for an early medieval household looking to control local resources and movement. Without excavation records or documentary sources attached to this site, the people who built and lived within it remain anonymous, as is the case for the vast majority of Ireland's estimated forty to fifty thousand surviving ringforts.