Mission Mountains Wilderness was created in 1975.
The area of Mission Mountains Wilderness is 298.97 square kilometers.
Sylvania Mountains Wilderness was created in 1994.
Gates of the Mountains Wilderness was created in 1964.
Birkhead Mountains Wilderness was created in 1984.
Cabinet Mountains Wilderness was created in 1964.
Trigo Mountains Wilderness was created in 1990.
Sawtooth Mountains Wilderness was created in 1994.
Whipple Mountains Wilderness was created in 1994.
Old Woman Mountains Wilderness was created in 1994.
Beaver Dam Mountains Wilderness was created on 1984-08-28.
El Paso Mountains Wilderness was created on 1994-10-31.
The area of Sylvania Mountains Wilderness is 75.603 square kilometers.