The area of Umatilla National Forest is 7,284.342 square kilometers.
The area of Umatilla National Wildlife Refuge is 96.246 square kilometers.
Gifford Pinchot National Forest Mount Baker-Snoqualmie National Forest Idaho Panhandle National Forest Okanogan National Forest Umatilla National Forest Wenatchee National Forest info from: http://gorp.away.com/gorp/resource/us_national_forest/wa.htm
Umatilla National Wildlife Refuge was created in 1969.
The area of North Fork Umatilla Wilderness is 81.52 square kilometers.
The area of Plumas National Forest is 4,451.542 square kilometers.
The area of Cleveland National Forest is 2,000,000.0 square meters.
The area of Modoc National Forest is 6,695.087 square kilometers.
The area of Chippewa National Forest is 6,474.97 square kilometers.
The area of Olympic National Forest is 2,564.4 square kilometers.
The area of Stanislaus National Forest is 3,634.478 square kilometers.
The area of Custer National Forest is 5,173.012 square kilometers.
The area of Bitterroot National Forest is 6,422.644 square kilometers.