Denver, Texas and Fort Worth Railroad

Colorado and Southern Railway

Schematic map of C&S lines
Reporting mark	C&S, CS
Locale	Colorado, Wyoming, New Mexico
Dates of operation	1898–1981
Successor	Burlington Northern
Track gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Previous gauge	3 ft (914 mm)

The Colorado and Southern Railway (reporting marks C&S, CS) was an American Class I railroad in the western United States that operated independently from 1898 to 1908, then as part of the Chicago, Burlington and Quincy Railroad until it was absorbed into the Burlington Northern Railroad in 1981.

The railway began as the consolidation of bankrupt railroads on 1898. The Colorado Central Railroad and Cheyenne and Northern Railway were brought together to form the Union Pacific, Denver and Gulf Railway in 1890. When Union Pacific went bankrupt in 1893 they were separated from the Union Pacific and united with the Denver, Leadville and Gunnison Railway and others, by Frank Trumbull to form the Colorado and Southern Railroad in 1898. In 1908 the Chicago, Burlington and Quincy Railroad bought control of the C&S. It would later merge into the Burlington Northern Railroad in 1981.

At the end of 1970 it operated 692 miles of road on 1116 miles of track; that year it reported 1365 million ton-miles of revenue freight. In 1980 route-miles had dropped to 678 but ton-miles had ballooned to 7230 million: Powder River coal had arrived.

C&S was also the parent company of the Fort Worth and Denver Railway, which ran from a connection at Texline south and east into Texas. The FW&D was established as a separate company because Texas law required that railroads operating within its borders must be incorporated within that state.

The Colorado and Southern narrow-gauge lines were formed in 1898 from the Colorado Central and the Denver, South Park and Pacific Railroads. The narrow gauge had four distinct lines: the Platte Canyon Line from Denver, Colorado to Como, Colorado, the Gunnison Line from Como to Gunnison, Colorado via Alpine Tunnel, Highline between Como and Leadville, Colorado, and the Clear Creek line from Denver to Silver Plume, Colorado. Major Branch lines were the Baldwin branch between Gunnison and Baldwin; the Keystone from Dickey, Colorado to Keystone, Colorado; the Blackhawk branch between Forks Creek and Central City, Colorado; the Alma Branch from Como to Alma, Colorado; and the Morrison Branch from Denver to Morrison, Colorado. The Colorado and Southern narrow never owned a new engine, all motive power coming from the former companies.