Clach Glas is a mountain on the Black Cuillin

Cuillin

This article is about the Cuillin of Skye. See Rùm for the Cuillin of Rùm.The Cuillin are a range of rocky mountains located on the Isle of Skye in Scotland. The true Cuillin are also known as the Black Cuillin to distinguish them from the Red Hills across Glen Sligachan...

 of Skye

Skye

Skye or the Isle of Skye is the largest and most northerly island in the Inner Hebrides of Scotland. The island's peninsulas radiate out from a mountainous centre dominated by the Cuillin hills...

 - its elevation is 2590 ft (789m) and the name translates as The Grey Stone. It is often traversed as a sustained scrambling route to Blaven

Blaven

Blà Bheinn , is a mountain on the Isle of Skye in Scotland. It is usually regarded as an outlier to the Black Cuillin. It is mainly composed of gabbro, a rock with excellent grip for mountaineers and scramblers...

, mostly at a standard between Easy and Moderate, depending on the line followed (see Parker, routes 101 & 102). It is the penultimate mountain in the Greater Traverse of the Black Cuillin.

Ashley Abraham called it 'the Matterhorn

Matterhorn

The Matterhorn , Monte Cervino or Mont Cervin , is a mountain in the Pennine Alps on the border between Switzerland and Italy. Its summit is 4,478 metres high, making it one of the highest peaks in the Alps. The four steep faces, rising above the surrounding glaciers, face the four compass points...

 of Skye', (a description which is often still used).

According to some sources the first ascent of the top was probably not until 1888 by Charles Pilkington and party.