Aberdeen Quarry Railroad part of DENVER & RIO GRANDE RAILROAD

Alamosa & State Line Railway part of DENVER & RIO GRANDE RAILROAD

Alamosa Railway part of DENVER & RIO GRANDE RAILROAD

American Smelting & Refining Company Railroad see PHILADELPHIA SMELTING & REFINING COMPANY RAILROAD

ARAPAHO JEFFERSON & SOUTH PARK RAILWAY

Argentine & Gray's Peak Railway part of ARGENTINE CENTRAL RAILWAY

ARGENTINE CENTRAL RAILWAY

ASPEN & WESTERN RAILWAY

BALD MOUNTAIN RAILROAD

Book Cliff Railway part of LITTLE BOOK CLIFF RAILROAD

BOSTON & COLORADO SMELTING COMPANY RAILROAD

Boston Coal and Fuel Company Railroad see PERKINS PEAK RAILWAY

BUSK IVANHOE TUNNEL CONSTRUCTION RAILROAD

Calumet Fuel Company Railroad see PERKINS PEAK RAILWAY

Canon City & Cripple Creek Railroad part of FLORENCE & CRIPPLE CREEK RAILROAD

Canon Coal Railway part of DENVER & RIO GRANDE RAILROAD

Central City Narrow Gauge Railway part of COLORADO CENTRAL NARROW GAUGE RAILWAY

CLIMAX MOLYBEDEUM RAILROAD

COLORADO & NORTH WESTERN RAILWAY

Colorado & Northern Railroad part of DENVER UTAH & PACIFIC RAILROAD

Colorado & Northwestern Railroad part of COLORADO & NORTH WESTERN RAILWAY

Colorado & Southern Railway Clear Creek Division part of COLORADO CENTRAL RAILROAD

Colorado & Southern Railway South Park Division part of DENVER SOUTH PARK & PACIFIC RAILWAY

Colorado & Southwestern Railroad part of DOLORES PARADOX & GRAND JUNCTION RAILROAD

COLORADO & WYOMING RAILWAY

Colorado Central & Pacific Rail Road part of COLORADO CENTRAL RAILROAD

COLORADO CENTRAL NARROW GAUGE RAILWAY

COLORADO CENTRAL RAILROAD

COLORADO EASTERN RAILROAD

Colorado Eastern Railway part of COLORADO EASTERN RAILROAD

Colorado Fuel & Iron Company Railroad see COLORADO & WYOMING RAILWAY

Colorado Midland Railroad Busk Ivanhoe Tunnel see BUSK IVANHOE TUNNEL CONSTRUCTION RAILROAD

Colorado Northern Railway part of DENVER UTAH & PACIFIC RAILROAD

COLORADO UTAH & WESTERN RAILROAD

Colorado Wyoming & Great Northern Railroad part of LITTLE BOOK CLIFF RAILROAD

CRIPPLE CREEK & VICTOR NARROW GAUGE RAILROAD

Cripple Creek Central Railway part of FLORENCE & CRIPPLE CREEK RAILROAD

Crystal River Railroad part of ASPEN & WESTERN RAILWAY

Crystal River Railway part of ASPEN & WESTERN RAILWAY

CUMBRES & TOLTEC SCENIC RAILROAD (also NEW MEXICO)

Denver & Barkeley Park Rapid Transit part of DENVER CONSOLIDATED TRAMWAY

Denver & Hill Park Railroad part of DENVER CONSOLIDATED TRAMWAY

Denver & Midddle Park Railway & Mining Company see DENVER & MIDDLE PARK RAILROAD

DENVER & MIDDLE PARK RAILROAD

DENVER & RIO GRANDE RAILROAD (also NEW MEXICO; UTAH)

Denver & Rio Grande Railroad Kubler Branch part of ROCKY MOUNTAIN FUEL COMPANY RAILROAD

Denver & Rio Grande Railway part of DENVER & RIO GRANDE RAILROAD

Denver & Rio Grande Western Railroad part of DENVER & RIO GRANDE RAILROAD

Denver & Rio Grande Western Railway part of DENVER & RIO GRANDE RAILROAD

Denver & Santa Fe Railroad part of DENVER CIRCLE RAILROAD

Denver & Scranton Railroad part of COLORADO EASTERN RAILROAD

DENVER & SOUTH PLATTE RAILROAD

Denver Aspen & Grand River Railway part of DENVER & RIO GRANDE RAILROAD

Denver Boulder & Western Railroad part of COLORADO & NORTH WESTERN RAILWAY

Denver Cable Railway part of DENVER CONSOLIDATED TRAMWAY

DENVER CIRCLE RAILROAD

Denver City Cable Railway part of DENVER CONSOLIDATED TRAMWAY

Denver City Electric Railway part of DENVER CONSOLIDATED TRAMWAY

Denver City Railroad part of DENVER CONSOLIDATED TRAMWAY

Denver City Railway part of DENVER CONSOLIDATED TRAMWAY

Denver City Traction Company part of DENVER CONSOLIDATED TRAMWAY

Denver City Tramway part of DENVER CONSOLIDATED TRAMWAY

DENVER CONSOLIDATED TRAMWAY

Denver Georgetown & Utah Railway part of DENVER SOUTH PARK & PACIFIC RAILWAY

Denver Land & Coal Company Railroad see COLORADO EASTERN RAILROAD

Denver Leadville & Gunnison Railway part of DENVER SOUTH PARK & PACIFIC RAILWAY

Denver Longmont & Northwestern Railroad part of DENVER UTAH & PACIFIC RAILROAD

Denver Marshall & Boulder Railroad part of DENVER WESTERN & PACIFIC RAILWAY

Denver Railroad and Land Company see COLORADO EASTERN RAILROAD

Denver Resort Railway & Telegraph Company see DENVER CIRCLE RAILROAD

DENVER SOUTH PARK & HILL TOP RAILWAY

Denver South Park & Pacific Railroad part of DENVER SOUTH PARK & PACIFIC RAILWAY

DENVER SOUTH PARK & PACIFIC RAILWAY

Denver Tramway part of DENVER CONSOLIDATED TRAMWAY

Denver Tramway Extension part of DENVER CONSOLIDATED TRAMWAY

DENVER UTAH & PACIFIC RAILROAD

DENVER WESTERN & PACIFIC RAILWAY

DOLORES PARADOX & GRAND JUNCTION RAILROAD

DURANGO & SILVERTON NARROW GAUGE RAILROAD

El Moro Railway part of DENVER & RIO GRANDE RAILROAD

EL PASO CONSOLIDATED GOLD MINING COMPANY RAILROAD

ELECTRIC & HYDRAULIC COMPANY RAILROAD

Fairmount Railway part of DENVER CONSOLIDATED TRAMWAY

FISHER LUMBER COMPANY RAILROAD

FLORENCE & CRIPPLE CREEK RAILROAD

Georgetown & Gray's Peak Railway part of ARGENTINE CENTRAL RAILWAY

GEORGETOWN LOOP HISTORIC RAILROAD

GEORGETOWN BRECKENRIDGE & LEADVILLE RAILWAY

Gilpin County Tramway part of GILPIN RAILROAD

GILPIN RAILROAD

GLOBE SMELTING & REFINING COMPANY RAILROAD

GOLDEN & RALSTON RAILROAD

Golden Circle Railroad part of FLORENCE & CRIPPLE CREEK RAILROAD

GOLDEN CITY & SOUTH PLATTE RAILROAD

Grand Valley Railway part of DENVER & RIO GRANDE RAILROAD

GREELEY SALT LAKE & PACIFIC RAILWAY

Hallack & Howard Lumber Company Railroad see DOLORES PARADOX & GRAND JUNCTION RAILROAD

HIGH COUNTRY RAILROAD

Intermountain Railroad part of COLORADO & NORTH WESTERN RAILWAY

Keefe (M.H.) Construction Company Railroad see BUSK IVANHOE TUNNEL CONSTRUCTION RAILROAD

LAPLATA COAL & IRON COMPANY RAILROAD

Leadville Mineral Belt Railway part of DENVER SOUTH PARK & PACIFIC RAILWAY

LITTLE BOOK CLIFF RAILWAY

LONDON SOUTH PARK & LEADVILLE RAILROAD

Longmont & Erie Railroad part of DENVER UTAH & PACIFIC RAILROAD

Longmont Middle Park & Pacific Narrow Gauge Railway part of DENVER UTAH & PACIFIC RAILROAD

McPhee & McGinnity Company Railroad see DOLORES PARADOX & GRAND JUNCTION RAILROAD

Middle Park Lumber Company Railroads see COLORADO UTAH & WESTERN RAILROAD

Montezuma Lumber Company Railroad see DOLORES PARADOX & GRAND JUNCTION RAILROAD

NATIONAL LUMBER & CREOSOTING COMPANY RAILROAD

New Mexico Lumber & Manufacturing Company Railroad see DOLORES PARADOX & GRAND JUNCTION RAILROAD

New Mexico Lumber Company Railroad see DOLORES PARADOX & GRAND JUNCTION RAILROAD; RIO GRANDE & PAGOSA SPRINGS RAILROAD

Occidental Development Company Railroad see BALD MOUNTAIN RAILROAD

Pagosa Lumber Company Railroad see RIO GRANDE PAGOSA & NORTHERN RAILROAD

PARK RAILWAY

PERINS PEAK RAILWAY

PHILADELPHIA SMELTING & REFINING COMPANY RAILROAD

PUEBLO & ARKANSAS VALLEY RAILROAD

RIO GRANDE & PAGOSA SPRINGS RAILROAD

Rio Grande Gunnison Railway part of DENVER & RIO GRANDE RAILROAD

RIO GRANDE PAGOSA & NORTHERN RAILROAD

Rio Grande Railroad part of DENVER & RIO GRANDE RAILROAD

Rio Grande Sangre de Cristo Railroad part of DENVER & RIO GRANDE RAILROAD

RIO GRANDE SOUTHERN RAILROAD

Rio Grande Western Railway part of DENVER & RIO GRANDE RAILROAD

ROCKY MOUNTAIN FUEL COMPANY RAILROAD

RUSK IVANHOE TUNNEL CONSTRUCTION RAILROAD

Rust (A.A.) Lumber Company Railroad see RUST'S LOGGING RAILROAD

RUST'S LOGGING RAILROAD

Sayre Newton Lumber Company Railroad see RUST'S LOGGING RAILROAD

Silverton Gladstone & Northerly Railroad part of SILVERTON RAILROADS

Silverton Northern Railroad part of SILVERTON RAILROADS

Silverton Railroad part of SILVERTON RAILROADS

SILVERTON RAILROADS

South Park & Leadville Shortline Railroad part of LONDON SOUTH PARK & LEADVILLE RAILROAD

TRINCHERA ESTATES RAILROAD

UINTAH RAILWAY (also UTAH)

Union Pacific Denver & Gulf Railway Clear Creek Division part of COLORADO CENTRAL RAILROAD

Union Pacific Denver & Gulf Railway South Park Division part of DENVER SOUTH PARK & PACIFIC RAILWAY

Waldorf Mining & Milling Company Railroad see ARGENTINE CENTRAL RAILWAY