The State of Oregon purchased the original of Sun Pass State Forest from Yawkey, Woodson, Ourbacker, and Algoma Lumber Company in 1943. In 1944, Klamath County deeded an additional to the Board of Forestry to expand the Sun Pass unit. In 1947 and 1948, the Oregon Board of Forestry bought two more parcels of private land which were added to Sun Pass.