Sawtooth Mountains Wilderness was created in 1994.
The area of Sawtooth Mountains Wilderness is 130.05 square kilometers.
Lake Chelan-Sawtooth Wilderness was created in 1984.
The area of Lake Chelan-Sawtooth Wilderness is 612.836 square kilometers.
Sylvania Mountains Wilderness was created in 1994.
Whipple Mountains Wilderness was created in 1994.
Cabinet Mountains Wilderness was created in 1964.
Mission Mountains Wilderness was created in 1975.
Trigo Mountains Wilderness was created in 1990.
Birkhead Mountains Wilderness was created in 1984.
Gates of the Mountains Wilderness was created in 1964.
Old Woman Mountains Wilderness was created in 1994.
El Paso Mountains Wilderness was created on 1994-10-31.