Glenisla, planted in 1949, is a productive forest mainly consisting of Sitka Spruce, a species known for its rapid growth and high-quality timber. Introduced to Scotland in 1831 by David Douglas, Sitka Spruce originates from the fog-belt of western North America, where it had various uses such as in basketry and boat caulking. Plans to establish native riparian woodlands are underway, though deer management is crucial to protect young trees. The forest is served by three main burns—Glen Taitney, Finlet, and Muckle—which supply water to the Backwater Reservoir and local rivers, benefiting nearby towns in Angus and Dundee.