This is a rath, the most common type of ringfort found across Ireland, typically understood as a defended farmstead of the early medieval period, roughly between the fifth and twelfth centuries. Most were built as enclosed homesteads for a single family or small farming community, the surrounding bank and ditch serving as much to pen livestock and signal status as to provide any serious military defence. What makes this one worth pausing over is its condition: many ringforts across the island have been ploughed out, built over, or quarried for their earthen banks, yet this example has held its shape.

The rath at Woodfield measures thirty-four metres in diameter and is defined by a single enclosing bank. An entrance opens at the southern side, a detail consistent with a widespread pattern among Irish ringforts, where south-facing openings were favoured, possibly for practical reasons of light and shelter. The site was recorded by Knight around 1975 and later included in the published Archaeological Inventory of County Galway, Volume II, covering North Galway, compiled by Olive Alcock, Kathy de hÓra, and Paul Gosling.