The Mississippi River & Bonne Terre Railway was a single-track standard-gauge steam railroad that was located in southeastern Missouri and began service in 1892. It extended from Riverside in a general southwesterly direction to the lead-mining field in St. Francois County. The main stem, from Riverside to Doe Run, was 46.492 miles (74.822 km) long. Eight short branch lines had a total trackage of 17.418 miles (28.032 km). Sidings and spurs aggregated 30.664 miles (49.349 km), and all tracks owned 94.574 miles (152.202 km).