The name "Càrn Eige" comes from the Scottish Gaelic language, and probably means either File Hill or Notch Hill. An alternative translation, if it were to be called "Càrn Eigh", would be the Hill of Ice; this would make it the only Scottish mountain with the word "ice" in its name.
Geography
Topography
The summit is pyramid-shaped, the culmination of three ridges meeting in an equilateral configuration. The nearest Munro is its "twin summit", Mam Sodhail, about to the southwest, and there are three other Munros on the massif. Beinn Fhionnlaidh ends a spur to the north, and there is a much longer grassy ridge running out to the east, which after leads to Tom a' Choinich and then after a similar distance culminates in the rather bland summit of Toll Creagach, at. As well as the five Munros topping the massif, there are a further 10 subsidiary minor summits, known as "Munro Tops". This ridge lies roughly equidistant between two lochs, Loch Affric/Loch Beinn a' Mheadhoin to the south, and the larger Loch Mullardoch to the north. Opposing several lower summits across Loch Mullardoch, the highest beingSgurr na Lapaich at, it dominates the area, being the highest summit in the region. To the north of the summit, there is an impressive glacial corrie that falls half a kilometre to the shores of Corrie Lochan.
In 1848, the mountain was climbed by Colonel Winzer of the Ordnance Survey, who discovered a pile of stones and deduced that it had been climbed earlier, although a local gamekeeper suggested it was a shelter for watchers. In 1891 Sir Hugh Munro, 4th Baronet listed Càrn Eige in his Munro Tables, in which it has remained. The full set of Munros has been "completed" at least 5,000 times since then.
Flora and fauna
Typical of the Scottish Highlands, the slopes of the mountain are largely treeless, especially at higher altitudes. The mountain is instead clad in a variety of grasses and mosses, which towards the summit are covered by snow during parts of the year. The lower slopes are described by Muir as "boggy, sodden moorland". The base of the southern side of the mountain, adjacent to Loch Affric, is wooded with Scots pine interspersed with other species such as oak, birch, and beech. These woods are inhabited by a number of endemic fauna, including the crested tit and the Scottish crossbill.
Location
Situated in the north of Scotland, Càrn Eige is on the border of two historic counties, Inverness and Ross and Cromarty, and is the highest point of the latter. The mountain is very remote, more than from the nearest road, in Glen Affric, although there is a youth hostel in the same valley that is nearer. The summit is at UK grid reference NH123261, which falls on the OS Landranger 25 map, the OS Explorer series 414–5, and the much larger area map 9.
Ascents
The mountain can be ascended from the south, beginning at Loch Affric, up the north side of Gleann nam Fiadh and reaching the summit of both Càrn Eige itself and then Mam Sodhail in either clockwise or anticlockwise fashion, potentially including Beinn Fhionnlaidh as an extra, since this is relatively difficult to access in any other way. The summit is marked by an Ordnance Survey triangulation pillar and a cairn. Including only the three principal Munros, a successful ascent of this mountain might take between 9 and 10 hours. There is also a route to the summit from the north, via Beinn Fhionnlaidh, starting from a boat-accessible spot on Loch Mullardoch.
