Platte River Wilderness was created in 1984.
The area of Platte River Wilderness is 96.89 square kilometers.
Owyhee River Wilderness was created in 2009.
Encampment River Wilderness was created in 1984.
Endicott River Wilderness was created in 1980.
Boulder River Wilderness was created in 1984.
Roaring River Wilderness was created in 2009.
Chuck River Wilderness was created in 1990.
The answer is the Platte river
Salt River Canyon Wilderness was created in 1984.
Hassayampa River Canyon Wilderness was created in 1990.
Upper Kiamichi River Wilderness was created in 1988.
Rock River Canyon Wilderness was created in 1987.