The island was formerly a deer park of the Dukes of Montrose, who had a hunting lodge built in 1793 and maintained a gamekeeper and his family there. 200 deer are recorded in 1800.Garnett, T. (1800). Observations on a Tour of the Highlands ... London. V.1. p. 39. There are ruins of a castle, probably built for Duncan, 8th Earl of Lennox whose seat was Balloch Castle at the south end of Loch Lomond. The castle was probably a hunting lodge for the deer park established on the island by King Robert I of Scotland in the early 14th century. After her husband Murdoch Stewart, Duke of Albany, father Donnchadh, Earl of Lennox, and two sons were executed by James I in 1425, Isabella Countess of Lennox retired to the castle on Inchmurrin with her grandchildren.
