St. Louis, Iron Mountain and Southern Railway

St. Louis, Iron Mountain and Southern Railway
No. 635, seen here in 2016 after preservation.
Overview
HeadquartersSt. Louis, Missouri
LocaleUnited States
Dates of operation18561917
SuccessorMissouri Pacific Railroad
Technical
Track gauge4 ft 8+12 in (1,435 mm) standard gauge
Other
Websiteslimrr.com

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.