A drumlin, for those unfamiliar with the term, is one of those smooth, whale-back hills of glacial deposit that give this part of Ireland its characteristically lumpy, rolling terrain, and they were favoured sites for enclosures precisely because of the natural elevation and visibility they offered. What survives at Dromore is an earthen bank and hedge largely worn down to a scarp, with traces of an outer ditch still just detectable. A field bank now bisects the interior, and hedgerow has been removed along part of the perimeter, yet the full circuit can still be traced on the ground. The Ordnance Survey mapped it twice, labelling it in gothic lettering as a "fort" on their 1834 six-inch edition and rendering it as a large hachured feature on the 1907 revision.

What gives this enclosure an unexpected dimension is its possible relationship to a designed landscape just across the county boundary in Tyrone. Roughly 1.5 kilometres to the east-north-east lies the south-western tip of a large earthwork composition known as "the Thistle", situated just west of Aughancloy village. That feature was laid out after 1722 by Acheson Moore, a Jacobite, apparently as a declaration of political sympathy rendered in turf and soil at a considerable scale. The thistle, of course, is the emblem of Scotland, and encoding such a symbol into the landscape would have been a quietly defiant gesture in the decades following the Williamite settlement. Researchers have noted that the Dromore enclosure is one of at least three hilltop enclosures in County Monaghan positioned between one and two kilometres from the Thistle's south-western tip, and that four further large enclosures across the border in County Tyrone occupy comparable positions. Together, these may have been intended to function as outlying rosettes, enhancing the overall composition of the Thistle as a piece of landscape design. A similarly large enclosure at Raflacony, around 750 metres to the south-east, encloses an older rath, suggesting that Moore, or whoever coordinated the scheme, was working with, and around, pre-existing ancient monuments rather than ignoring them.