It is not much to look at on paper, thirteen metres long and varying between one and four metres wide, but the fact that it survives at all, and that we can date it to within a decade of 1547 BC, says something quietly remarkable about what bogs preserve and what they conceal.

The structure is a togher, the Irish term for a wooden trackway built across wet or boggy ground. The technique used here was relatively straightforward: brushwood laid longitudinally, sometimes resting on a foundation of additional brushwood and roundwood poles. What makes the Killoran example particularly interesting is where it sits. The trackway partially overlies a fulacht fia, a type of site associated with Bronze Age cooking or industrial activity, typically identified by a mound of fire-cracked stones beside a trough that would have been filled with water and heated using those stones. The relationship between the two features suggests the area was in use across some period of time, with the trackway representing a later intervention into a landscape already marked by human activity. The date of 1547 BC was obtained not from the trackway timbers themselves but from a collapsed oak found lying directly on top of the structure, placing a useful if indirect bracket around when the road was in use. Excavation of the site is reported in Ó Néill's 1999 account of the Killoran excavations.