Tags: Garden.
Lake Wilderness Arboretum (40 acres) known for a time as the South King County Arboretum is an arboretum located in Maple Valley Washington. It is open daily without charge. The Lake Wilderness Arboretum is managed by the South King County Arboretum Foundation.The arboretum was first established as a nonprofit organization in 1965 with its initial design completed and implemented in 1970. The Western Azalea Garden was dedicated in June 2000.