Northern Pacific mainline at Stampede Pass, Washington Territory, circa 1887. Tracks at summit of switchback, outfit cars in snow. Photo by I.G. Davidson, J.M. Fredrickson collection.. Other Subject Classes: track, switchback, outfit car, mountains

Northern Pacific snowplow at Stampede Pass, Washington Territory, circa 1887. Steam snowplow and locomotives, workers, on trestle in snow. J.M. Fredrickson collection. Other Subject Classes: snowplow, steam locomotive, bridge, railroad employee, mountains

Northern Pacific snowplow at Stampede Pass, Washington Territory, circa 1887. Steam snowplow and locomotives, workers, on trestle in snow. J.M. Fredrickson collection. Other Subject Classes: snowplow, steam locomotive, bridge, railroad employee, mountains