The Lodge opened in August 1960, and is named after David Marshall, chairman of the Carnegie UK Trust during the 1950s.
It was his
idea that the Trust should fund the construction of the lodge.
The Trust's substantial donation might have appeared risky at the time but the Lodge has proved a popular destination for visitors ever since.
Descendents of the late David Marshall
were among the invited guests who gathered at the Aberfoyle attraction last month to celebrate its half century.