The Denver & Rio Grande Railroad was founded in 1870 by William Jackson Palmer and associates with an ambitious plan to build south from Denver toward Mexico.
The company adopted three-foot narrow gauge to reduce construction cost and allow tighter curvature through difficult mountain terrain.
The first line opened south from Denver toward Colorado Springs and Pueblo, beginning a rapid period of expansion.
The railroad’s strategy soon brought it into direct conflict with the Atchison, Topeka & Santa Fe over access to key corridors.
The Royal Gorge became the most famous of those conflicts because both companies wanted the narrow Arkansas River canyon west of Cañon City.
Legal battles, armed guards, leased routes, and corporate maneuvering eventually left the Rio Grande in control of the gorge corridor.
The railroad also expanded west and southwest into mining districts where rail access could determine the economic future of towns.
The San Juan Extension reached Durango in 1881 and Silverton in 1882, creating routes that survive today in preservation.
Financial restructuring, standard-gauge competition, and changing ownership transformed the original Denver & Rio Grande into later corporate forms.
For TransitSatellite, the D&RG page should end before later D&RGW history is folded in. The original railroad and the Denver & Rio Grande Western are connected but not legally identical throughout their histories.