
The Continental Divide snake through this portion of the Montana Rockies, separating the headwaters of the Little Blackfoot River from the eastern slopes. The Northern Pacific railroad dominates the transportation corridor, navigating the steep grades via the Mullan Tunnel near Mullan Pass. This alignment reflects the late-19th-century engineering required to bridge the divide, connecting settlements like Elliston and Blossburg to the wider rail network.
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3 editions found
1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1899 · Boulder
USGS Topo · 1:125,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000
1947 · Butte
USGS Topo · 1:250,000
1950 · Jefferson City
USGS Topo · 1:62,500
1950 · Helena
USGS Topo · 1:62,500
1954 · Basin
USGS Topo · 1:62,500
1958 · Butte
USGS Topo · 1:250,000