Friends of Glendon Forest is a small community group founded in 1994, dedicated to the protection of restoration of Glendon Forest, a natural area located in the Lower West Don River Valley.

The Toronto and Region Conservation Authority designated Glendon Forest as an Environmentally Significant Area (E.S.A. #65) in 1982 because of its important habitat, high quality diverse woodlot, regionally rare plants, and importance as a corridor for migrating birds. The land is owned by the TRCA and managed by City of Toronto Parks and Recreation as a natural area. Impacts to this area include increased and inappropriate human uses, and degradation from natural sources such as invasive species, erosion, and storm events.

Since 1994, regeneration and restoration efforts have included trail improvement, planting of trees and wildflowers, streambank stabilization, protective signage and ongoing planning for the future.