Skye that requires technical climbing skills to reach the summit. These hills make demands of the hill walker that exceed any others found in Scotland and a full traverse of the Cuillin ridge may take 15–20 hours. The Red Hills (Gaelic: ) to the south are also known as the Red Cuillin. They are mainly composed of granite that has weathered into more rounded hills with many long scree slopes on their flanks. The highest point of these hills is Glamaig, one of only two Corbetts on Skye. The northern peninsula of Trotternish is underlain by basalt, which provides relatively rich
Cuillin one of 40 such areas in Scotland. A Scottish Natural Heritage (SNH) review of the special qualities of the national scenic area stated: There are a number of theories about the derivation of the name "Cuillin". It is often suggested that it comes from the Old Norse word "kjölen" meaning ridges. This derivation gave rise to debate as to whether the hills should be referred to collectively as the Cuillin, rather than Cuillins. "Kjöllen" may also refer to the keel of a boat, suggesting a similarity with an upturned Viking longship. Gaelic derivations of the name suggest a link to