Mount Lyell is a mountain in the West Coast Range of Western Tasmania, Australia.

Mount Lyell has an elevation of 917 metres (3,009 ft) above sea level.

In the late twentieth century, just west of the Comstock workings was a section of the mine known as Cape Horn.

The western end of the mountain has been named Cape Horn Spur, as the Mount Lyell Mining and Railway Company had a mine called Cape Horn in the 1970s at the west end of this spur.

The sides of the mountain have been subjected to bush fires, smelter fumes and high rainfall, consequently the resultant vegetation and the legacy of tree stumps give the southern sides of the mountain a unique appearance.