Imnaha National Forest was established in Oregon on March 1, 1907 with when the first Wallowa National Forest and Chenismus National Forest were combined. Its lands presently exist as part of Wallowa–Whitman National Forest.
It is adjacent to Hells Canyon National Recreation Area.
References
External links Forest History Society Listing of the National Forests of the United States and Their Dates (from the Forest History Society website) Text from Davis, Richard C., ed. Encyclopedia of American Forest and Conservation History. New York: Macmillan Publishing Company for the Forest History Society, 1983. Vol. II, pp. 743-788.