RCAF Station Edgar was part of the Pinetree Line of radar stations and was located at Edgar, Ontario Canada, about 20 kilometres northeast of Barrie. Built in 1952, the site was home to the 31st Aircraft Control & Warning Squadron and was operational in its intended role between 1952 and 1964. The complex was sold to the provincial government of Ontario in November 1964 for CA$218,225, and was used as an Adult Occupational Centre for developmentally disabled or handicapped adults until 1999.