Until 1904, Shoshone County included present-day Clearwater County to the south. That portion was annexed by Nez Perce County for several years and then was established as a new county in 1911. When the Silver Valley population rose dramatically in the 1880s, the seat was moved to Murray in 1884 (and to Wallace in 1898) to better serve the majority of the county's population. The southern area's population increased with homesteading in the Weippe area in the late 1890s. The vast distance and time required for travel to Wallace from the Clearwater River area prompted the southern portion to move to Nez Perce County.