The name means Cairn of the Idol. Note the spelling carefully, it's not "Idle", but refers to a small golden figurine reputed to have been discovered hidden in the cairn some time in the eighteenth century. We've climbed to the top on three separate ocassions, twice on backpacking trips, but now alas this summit of the northern Carneddau has been demoted. It doesn't rise enough above its surroundings John and Graham told us after their latest surveying expedition.
It's high enough of course, but the crucial rise amounts to 14m +/- 0.22m. So close indeed!
Still please don't ignore this summit. It's only a short deviation on the route from Tal y Fan to Drum and it would be churlish indeed to walk carefully round to avoid the "unnecessary" ascent. Please give it our regards.