Glen Brittle (Gleann Breadail in Scots Gaelic) [the name is probably derived from old Norse "Bred Dal" (broad valley) with the Gaelic Glean being prefixed later (valley broad valley) ] is a large glen in the south of the Isle of Skye, in Scotland. It runs roughly south to north, along the River Brittle, which has its mouth at Loch Brittle (a sea loch). The glen is also overlooked from the east by the formidable Cuillin, the largest mountains on Skye. Many tributaries of the Brittle run down from these mountains into the glen, including a stream with waterfalls known as the Fairy Pools, a popular place to go for a walk.