Lamont was officially incorporated on October 22, 1910. The town was named for former vice president of the Northern Pacific Railway, Daniel Lamont. Lamont was initially founded as a terminal of the Spokane Portland & Seattle Railway, a joint venture of the Jim Hill controlled railroads, Northern Pacific and Great Northern Railways. Lamont is on the Pasco-Spokane extension of the SP&S. The terminal included a depot, yard, 22 stall roundhouse and locomotive servicing facilities. These facilities included water and oil tanks for SP&S steam locomotives, and a 6 pocket coal dock for Northern Pacific Rwy steam locomotives. Crews from Spokane and Pasco would work to Lamont and lay over before working back home again. But the railroad shortly reconsidered the remote outpost of Lamont as a terminal, and when the roundhouse burned in 1913, crews started working through between Pasco and Spokane.