Northern Pacific 7000, an F9 set, helps a westbound extra freight led by Northern Pacific 5120 up Bozeman Pass at Muir, Montana, in May 1954. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, helper locomotive, wood caboose.

Northern Pacific 7000, an F9 set, helps a westbound extra freight led by Northern Pacific 5120 up Bozeman Pass at Muir, Montana, in May 1954. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, helper locomotive, wood caboose.

Northern Pacific 7000, an F9 set, helps a westbound extra freight led by Northern Pacific 5120 up Bozeman Pass at Muir, Montana, in May 1954. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, helper locomotive, wood caboose.

Northern Pacific 5409, an Electo-Motive Division FT, rounds the curve east of Saint Regis, Montana, with a westbound extra freight on May 28, 1953. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, river.

Northern Pacific 2524, a General Electric U25C, leads SD45s 3608 and 3621 and an eastbound extra freight by the depot at Missoula, Montana, in July 1968. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, passenger depot.

Northern Pacific 2524, a General Electric U25C, leads SD45s 3608 and 3621 and an eastbound extra freight out of Missoula, Montana, in July 1968. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive, freight train, passenger depot.

Northern Pacific depot in Deer Lodge, Montana on April 29, 1998.

Northern Pacific depot in Deer Lodge, Montana on April 29, 1998.

Northern Pacific depot at Bozeman, Montana, from the track-side on September 11, 1993. Station is in the 1st subdivision of the Rocky Mountain division. Photo by GJ Werkema. Other Other subject classes: Structure, Depot

Northern Pacific depot at Bozeman, Montana, from the street-side on September 11, 1993. Station is in the 1st subdivision of the Rocky Mountain division. Photo by GJ Werkema. Other Other subject classes: Structure, Depot