Well seen from the viewpoint at Mam Ratagan, this small stone fort appears not to have survived the passage of time too well (unfortunately I did not have time to check this out conclusively owing to the unexpected excellence of Caisteal Grugaig.... maybe next time, then). Nevertheless the landscape context is first class, the enclosure crowning a rocky promontory near the far eastern shore of Loch Duich, set beneath a towering mountainscape including ‘The Five Sisters of Kintail’.
According to Canmore the dun is:
‘... Oval on (sic) plan, the dun measures 24.5m E-W by 16.0m N-S within a wall c. 2.5m thick, reduced to a stony scarp with a few stones of the outer face visible intermittently around the W half. A deep hollow at the modern S approach probably denotes the mutilated entrance. In the interior in the NE, is a modern enclosure, 6.0m E-W by 7.0m N-S within a wall 0.8m thick. [OS (A A) 13 June 1974]‘
Dunan Diarmid is one of a quartet of ancient defensive sites in the environs of Loch Duich.... the restored castle of Eilean Donan, to the west, apparently stands upon the remnants of a vitrified enclosure, whilst Torran a’Bharraich overlooks the southern flank. Arguably the finest is the broch of Caisteal Grugaig, near Totaig, complementing Eilean Donan guarding the confluence of Loch Duich with Lochs Long and Alsh.