Humboldt Junction was originally the crossing of the east-west Duluth, South Shore & Atlantic Marquette to Duluth main line, and the Republic Branch of the Chicago & North Western from Clowry to Republic via Humboldt. When the DSS&A was pulled up east of here, between Winthrop Junction and Humboldt, this location became a new junction point for CN trains using the former DSS&A line to their old line for locations west to Baraga.
When the new Mineral Range reinstalled tracks to the Humboldt mineral processing facility, a new junction switch was established here.
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