
Dillon serves as a central hub in this mid-century look at southwest Montana, where the Beaverhead River and Big Hole River valleys carve through a high-altitude landscape. The map captures a critical transportation junction, showing the Union Pacific and Northern Pacific railroads connecting remote settlements like Armstead and Grant to larger centers. The Continental Divide zigzags across the territory, separating the drainages of the Jefferson River and Ruby River from the western ranges.
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This is the sole edition of this map. No revisions or reprints were ever made.
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