In the 1970s and 1980s, the State of Oregon and the Winema National Forest (now the Fremont-Winema National Forests) agreed on a series of forest land exchanges to expand the contiguous area of Sun Pass. The state gave up a number of small outlying parcels in exchange for of United States Forest Service land adjacent to the main area of Sun Pass. These exchanges completed the expansion and consolidation of Sun Pass State Forest.