The monument consists of a hillfort of Iron Age date. The fort
displays at least two phases of construction.
The fort, usually known as Glenroan Mote, although formerly
Glengappock, is set on a low hill. The earliest feature is an oval enclosure within a much-reduced rampart. This measures 32m by 20m internally. Overlying this is a later defensive arrangement, a stone wall (now ruined) surrounding an oval area 50m by 40m. Except for the
S side, where there is a very steep slope, this wall has been further defended by two ditches and ramparts. The entrance to the later work
is on the SW, and the line of the inner ditch appears to have been
left incomplete on the NE side. Specimens of vitrified material are
in the Dumfries Museum from this monument, but it is not clear from which phase of construction they derive.
The area to be scheduled is circular, 115m in diameter, to include
the whole hilltop, including the two phases of fortified enclosure
and all associated ramparts, walls and ditches, as marked in red on
the accompanying map.