Northern Pacific mainline at Stampede Pass, Washington Territory, in 1887. Summit of switchback at Lizard Lake in forested area. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: tracks, switchback, mountains

Northern Pacific mainline at Stampede Pass, Washington Territory, in 1887. Three levels of track at summit of switchback, frame section house. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: track, switchback, section house, mountains

Lithograph of Northern Pacific freight train at Stampede Pass, Washington Territory, in 1887. "Tacoma Guide" drawing of train with two Decapod-type steam locomotives at horseshoe curve on switchback. J.M. Fredrickson collection.. Other Subject Classes: freight train, freight car, steam locomotive, switchback, track, mountains

News story of Northern Pacific switchback at Stampede Pass, Washington Territory, in 1887. Description of switchback operation, diagram. J.M. Fredrickson collection.. Other Subject Classes: switchback