St. Louis, Iron Mountain and Southern Railway
No. 635, seen here in 2016 after preservation. | |
| Overview | |
|---|---|
| Headquarters | St. Louis, Missouri |
| Locale | United States |
| Dates of operation | 1856–1917 |
| Successor | Missouri Pacific Railroad |
| Technical | |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
| Other | |
| Website | slimrr |
The St. Louis, Iron Mountain and Southern Railway (St. L., I. M. & S.), commonly known as the Iron Mountain, was an American railway company that operated from 1856 until 1917 when it was merged into the Missouri Pacific Railroad.