This is a cashel, the term used for a ringfort built from stone rather than earthen banks, and Caherloghan is a respectable example of the type. The surrounding wall still stands up to 1.6 metres on its outer face, and at nearly eleven metres across at its base it would have been an imposing boundary in its working lifetime, even if it now sits low and grass-covered in the Clare pasture.

The name Caherloghan appears on all historic Ordnance Survey mapping of the area, which means it was already a recognised feature of the landscape when the first six-inch sheets were produced in 1840. That same mapping reveals something of the site's later complications: a field boundary appears to cut through the south-eastern arc of the enclosure wall on the 1840 edition, though by the time the twenty-five-inch OS map and the 1921 six-inch revision were drawn, that boundary is shown abutting rather than truncating the monument. The most plausible reading is that the field boundary was at some point absorbed into the enclosure wall itself, which would account for the notably thicker wall dimensions, up to five metres across at the top, in precisely that south-eastern section. A possible fosse, a defensive ditch, runs along the south-western to western side, though it is broad and shallow and inconclusive, partly because natural rock outcrops in the area make it difficult to distinguish deliberate digging from the underlying limestone. Inside the enclosure, the interior is not empty. A drystone wall runs across it off-centre, and clustered around this internal division are the remains of at least two hut sites and a house site, suggesting the cashel was reused or continuously occupied across more than one phase of activity.