Eilean Musdile (Mansedale) is an islet, and lighthouse to the south west of Lismore in the Inner Hebrides.

The island lies in the entrance to Loch Linnhe, separated from Lismore by a sound ¼ miles across.

The lighthouse was built by Robert Stevenson in 1833 at a cost of £4260[4] and initially showed a fixed white light.

The 9-foot (2.7 m) monolith appears to have recorded the midwinter sunset[clarification needed] and is thought to have been removed during construction of the lighthouse.

[5] The skerry of Lady's Rock lies a short distance to the south west.