Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Large timber trestle at Station 253 on switchback, track inspector on velocipede. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, railroad employee, velocipede, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, circa 1887. Timber trestle, track workers, handcar. Photo by I.G. Davidson, J.M. Fredrickson collection. Other Subject Classes: bridge, railroad employee, track car

Northern Pacific bridge at Stampede Pass, Washington, circa 1890. Derelict remains of timber trestle on old switchback. J.M. Fredrickson collection. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Large timber trestle at Station 253 on switchback, track inspector on velocipede. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, railroad employee, velocipede, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 379 on switchback, logged-off hillside. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Curved timber trestle at Station 70 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 85 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 400 on switchback, logged-off hillside. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback, mountains

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 100 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback

Northern Pacific bridge at Stampede Pass, Washington Territory, in 1887. Timber trestle at Station 112 on switchback. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: bridge, switchback