This togher, the Irish term for a trackway laid across wet or marshy ground, was built from carefully arranged timbers to carry people and perhaps animals across terrain that would otherwise have been impassable. It is a quietly remarkable thing: a practical solution to a soggy landscape, frozen in place by the very conditions it was designed to cross.

The Derrindiff togher runs east to west and measures just under two metres wide, roughly the span of a narrow modern lane, and about fifteen centimetres deep. Its construction follows a method well attested in Irish wetland archaeology: a combination of transverse and longitudinal roundwood, specifically ash and hazel, averaging around nine centimetres in diameter, packed out with finer brushwood between three and four centimetres across. Ash and hazel were practical choices, both being flexible, relatively fast-growing, and available in abundance in the kinds of mixed woodland that once bordered Irish bogs. The brushwood fill helped distribute weight and stabilise the surface underfoot. Together, the layers created a firm path across ground that would otherwise have shifted and swallowed anyone trying to cross it.