It is unassuming to the eye on the ground, mostly buried under heather and sod, the banks rising only between 0.3 and 0.6 metres at their highest. At one point, however, the stone fabric breaks through the surface, hinting at what lies beneath. A cairn, a mound of stones typically associated with prehistoric burial, sits just outside the north-east corner, adding a further layer of ambiguity to a monument that resists easy explanation.

The enclosure is tentatively identified as a possible cursus, a term borrowed from Latin by early antiquaries who mistook such monuments for Roman racecourses. Cursus monuments are in fact Neolithic in origin, long parallel-banked enclosures whose purpose remains genuinely uncertain; they may have served as processional routes, boundaries between the living and the dead, or something else entirely that has left no trace in the archaeological record. The banks at Keadeen appear to have been constructed from the scree already present on the mountainside, which would make the labour involved somewhat less extraordinary, though still considerable on such a steep slope. The lower end of the enclosure closes with a bank, while the upper end appears to be open, a detail that may eventually prove significant in any future interpretation. The classification as a cursus remains cautious, the surviving evidence being insufficient for certainty, but the overall form is not inconsistent with the type.