The Washington, Idaho and Montana (WI&M) Railway was built in 1905-1907 to access the world's finest stand of white pine. The fifty-mile line from Palouse, Washington, to Bovill, Idaho, was the Potlatch Lumber Company's conveyance for timber to mill, cut lumber to outside connections, and the artery of commerce for the region. The road carried so much white pine that it adopted the nickname, the White Pine Route. White Pine Route tells the history of the WI&M through its independent period (1905-1962), as a wholly owned subsidiary of the Milwaukee Road (1962-1980), as the WI&M Branch of the Burlington Northern (1980-1996), and as the WI&M Industrial Lead of the Palouse River and Coulee City Railroad (1996-present). Part II documents WI&M rolling stock, from its initial steam power and logging locomotives of the Potlatch Lumber Company, through its railcars carrying passengers, mail, and express from the Depression until the end of passenger traffic in 1955, to its diesel era. Railroad structures and logging,operations of the Potlatch Lumber Company are covered. Over 400 photographs, maps, equipment roster, index and bibliography