They are among the most dramatic and spectacular peaks in the British Isles and made of some of the oldest rocks in the world.

In geology, Torridonian describes a series of proterozoic arenaceous sedimentary rocks of Precambrian age.

They have steep terraced sides, and broken summit crests, riven into many pinnacles.

The summit ridges provide excellent scrambling, and are popular with hillwalkers and mountaineers.

There are numerous other mountains outside the immediate area of Loch Torridon which have the same characteristics, such as An Teallach near Ullapool.