The Fitchburg Railroad is a former railroad company, which built a railroad line across northern Massachusetts, United States, leading to and through the Hoosac Tunnel. The Fitchburg was leased to the Boston and Maine Railroad in 1900. The main line from Boston to Fitchburg is now operated as the MBTA Fitchburg Line; Pan Am Railways runs freight service on some other portions.HistoryThe Charlestown Branch Railroad was incorporated April 4, 1835, as a short branch from the Boston and Lowell Railroad to Sweet's Wharf in Charlestown, opening in January 1840. The Fitchburg Railroad was incorporated March 3, 1842, to run from Boston to Fitchburg, and bought land next to the Charlestown Branch in May 1843. Construction began on May 20, and the first section to Waltham opened on December 20, 1843, operated by the Charlestown Branch until May 1, 1844. Further sections opened to Concord June 17, 1844, Acton October 1, 1844, Shirley December 30, 1844, and Fitchburg March 5, 1845. The new track next to the Charlestown Branch opened in August 1844; the Fitchburg Railroad leased the Charlestown Branch itself on September 1, 1845, and outright bought the branch on January 31, 1846. In 1848 a new bridge opened, carrying the line from Charlestown to downtown Boston.
