Wilderness Act, land requirements-Gross possible acreage considered for wilderness preservation system-Continued 47,261 1 See headnote regarding gross acreage. 2 National forest areas are specifically designated by the Wilderness Act. 'National park system and national wildlife refuges and ranges are not specifically designated by the Wilderness Act; areas here included are in accordance with unofficial interpretation of the Wilderness Society. 77350-62-pt. 4-15 1. Grand Canyon National Park........ 3. Sycamore Canyon Primitive Area (National Forest)................ .................. 3,567,852 7. Sierra Ancha Wild Area (National Forest)................................................ 12. Cabeza Prieta Game Range....... 13. Organ Pipe Cactus National Monument..................................................................................... 16. Chiricahua Wild Area (National Forest)....................................................... |