 The two reserves were later merged to create the Imnaha National Forest on March 1, 1907.On July 1, 1908, the name was changed to Wallowa National Forest, and in 1954 the Wallowa was administratively combined with the Whitman National Forest to create the Wallowa–Whitman.The Whitman had been established on July 1, 1908, from part of the Blue Mountains National Forest.