The following rail lines have been owned or operated by the Denver and Rio Grande Western Railroad or its predecessors.
Englewood (Military Junction) to Fort Logan
Louviers (Lehigh Junction) to Lehigh Mine
Castle Rock to Hathaway
Hathaway to O'Brien's Quarry
Douglas to Madge Quarry
Colorado Springs (Manitou Junction) to Manitou
Florence (Oak Creek Junction) to Oak Creek
Chandler Junction to Chandler Mine
Fremont Junction to Fremont Mine
Cañon City (Grape Creek Junction) to Westcliffe
Howard's Quarry Junction to Calcite
Brown Canon (Hecla Junction) to Calumet
Malta to Leadville
Oro Junction to Rowe Mill
Leadville to Ibex
Graham Park Junction to Tucson
Leadville Junction to Leadville (Leadville Branch)
Poncha Junction to Monarch
Mears Junction to Alamosa
Villa Grove to Orient
Moffat to Cottonwood
Parlin to Quartz
Gunnison to Anthracite
Crested Butte to Floresta
Castleton to Kubler
Gunnison (Aberdeen Junction) to Aberdeen Quarry
Delta (North Fork Junction) to Oliver
Brendel to Potash
Mounds to Sunnyside
Helper (Spring Canyon Junction) to Mutual
Helper (Kenilworth Junction) to Kenilworth
Kyune (Jennings Junction) to quarries
Ephraim to Morrison
Salina to Nioche
Mammoth Junction to Mammoth Mill
Provo to Heber City
Provo (Provo Junction) to Orem
Welby to Garfield
Dalton to Lark
Loline Junction to Cuprum
Bingham (Copper Belt Junction) to Montana-Bingham
Yampa Mine Connection to Yampa Mine
Midvale to Wasatch
Roper Junction to Park City
Farmington (Lake Park Junction) to Lake Park
Roy to Cox
Minnequa (Sonora Junction) to Trinidad; branch from Cuchara Junction to Walsenburg (Walsenburg Junction)
Rouse Junction to Rouse (later began at Mayne and then Monson on the C&S trackage rights)
Old Rouse Junction to Old Rouse Mines
Engleville Junction to Engleville
Minnequa (Zinc Junction) to Blende
Mustang to Capers (including part of the Old Main Line near Capers)
Longsdale Junction to Boncarbo
Walsenburg (Loma Junction) to Alamo
Pictou (New Pacific Junction) to New Pacific Mine
La Veta (Reliance Junction) to Ojo
La Veta (Tropic Junction) to Tropic
Taos Junction to La Madera
Chama (Biggs Junction) to Tierra Amarilla
Gato (Pagosa Junction) to Pagosa Springs
Lumberton to Gallinas
Carbon Junction to Farmington
Newcomb to Vasquez (old line over Corona Pass; abandoned when Moffat Tunnel opened)
Hitchens to Energy
Vance Junction to Pandora