Kilmun is also home to an extensive arboretum managed by the Forestry and Land Scotland. Established in the 1930s to monitor the success of a variety of exotic tree species in the humid west coast environment, it includes specimens of Sequoia, Japanese Larch, Araucaria araucana (monkey puzzle) and Japanese Chestnut amongst many others from around the world. A series of woodland walks have been established of varying gradients and degrees of difficulty, which link by a forestry track to Benmore wood at the top of Puck's Glen.