The 1841 to 1842 Ordnance Survey map records it plainly; by the 1916 edition, it had been so thoroughly levelled that only a small fragment remained. What survived that erasure is a raised mound sitting in the north-east sector of the interior, measuring roughly six metres north to south, five metres east to west, and about one metre in height.

The enclosure was a univallate cahir, meaning a stone ringfort enclosed by a single defensive wall or rampart, a form of settlement that was common in early medieval Ireland and frequently associated with farming families of some local standing. The cahir at Tiduff appears to have been a substantial enough site in its time, close to a second enclosure to its north-west, suggesting a degree of activity or occupation in this part of north Kerry. The interior mound, modest as it now appears, may represent accumulated occupation debris, a deliberate earthen feature, or the remnant of some internal structure; the notes do not specify, and the levelling of the surrounding enclosure has made the broader context difficult to read. What is clear is that between those two map surveys, roughly seventy years apart, the site was altered beyond recovery.