The Cuillins are two mountain ranges that dominate the southern half of the Isle of Skye. The Black Cuillin ridge is the higher of the two with peaks that rise above 3,000 feet in places. The Black Cuillin mountains are considered to be expert-level climbs. The Red Cuillin mountains (named after their red granite) are much gentler with a maximum elevation of 2,543 feet. This mountain range is very popular with hill walkers.