Bore Tunnel (296)
Built 1908 (785)
Built during 1900s (7,631)
Chicago, Milwaukee, St. Paul & Pacific Railroad (1,108)
Gallatin County, Montana (47)
Montana (843)
| Open (40,968)
Owned by state (16,553)
Rail-to-road (358)
Railroad (16,454)
Total length 250-500 feet (5,506)
Tunnel (1,359)
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