Colorado - Area of significance: Transportation
| Alpine Tunnel Historic District |
| Animas Canon Toll Road |
| Armstrong Hotel |
| Arvada Downtown |
| Atchison, Topeka and Santa Fe Railway Passenger Depot |
| Big Thompson River Bridge III |
| Big Thompson River Bridge IV |
| Black Squirrel Creek Bridge |
| Boggsville |
| Boreas Railroad Station Site |
| Boulder Creek Bridge |
| Bradford, Robert Boyles, Property |
| Bridge over Fountain Creek |
| Calhan Rock Island Railroad Depot |
| Castle Rock Depot |
| Cherry Creek Bridge |
| Colorado and Southern Railway Depot |
| Colorado River Bridge |
| Colorado Springs Airport |
| Colorado Springs and Cripple Creek District Railway-Corley Mountain Highway |
| Comanche Crossing of the Kansas Pacific Railroad |
| Como Roundhouse, Railroad Depot and Hotel Complex |
| Cottonwood Creek Bridge |
| Cozens Ranch House |
| Creede Branch, Denver and Rio Grande Railroad |
| Crested Butte Denver and Rio Grande Railroad Depot |
| Crystola Bridge |
| Denver and Intermountain Railroad Interurban No. 25 |
| Denver and Rio Grande Depot |
| Denver and Rio Grande Railroad Depot |
| Denver and Rio Grande Railroad Locomotive No.169 |
| Denver and Rio Grande Western Railroad Depot |
| Denver and Rio Grande Western Railroad Locomotive No. 315 |
| Denver, Boulder and Western Railway Historic District |
| Denver City Cable Railway Building |
| Denver City Railway Company Building |
| Denver-Colorado Springs-Pueblo Motor Way Company Inc. Garages |
| Denver, Northwestern and Pacific Railway Historic District |
| Denver & Rio Grande Railroad Box Outfit Car No. 04414 |
| Denver & Rio Grande Railroad San Juan Extension |
| Denver & Rio Grande Railroad South Fork Water Tank |
| Denver & Rio Grande Western Railroad Boxcar No. 3132 |
| Denver & Rio Grande Western Railroad Caboose No. 0577 |
| Denver & Rio Grande Western Railroad Locomotive No. 278 and Tender |
| Denver & Rio Grande Western Railroad Stock Car No. 5620 |
| Denver & Rio Grande Western Railroad Stock Car No. 5679D |
| Denver Tramway Powerhouse |
| Dolores River Bridge |
| D & RG Narrow Gauge Trestle |
| Durango-Silverton Narrow-Gauge Railroad |
| Engine No. 463 |
| Fall River Road |
| Fort Collins Municipal Railway Birney Safety Streetcar No. 21 |
| Foster House Stage Station and Hotel Site |
| Georgetown Loop Railroad |
| Glen Eyrie |
| Gold Prince Mine, Mill and Aerial Tramway |
| Granada Bridge |
| Graves Camp Rural Historic District |
| Greeley, Salt Lake and Pacific Railroad-Stout Branch |
| Gunnison River Bridge I |
| Gunnison River Bridge II |
| Hagerman Mansion |
| Hayden Depot |
| Hay's Ranch Bridge |
| Holly Santa Fe Depot |
| Huerfano Bridge |
| Jefferson Denver South Park and Pacific Railroad Depot |
| Johnson Stage Station |
| La Veta Pass Narrow Gauge Railroad Depot |
| Limon Railroad Depot |
| Little Fountain Creek Bridge |
| Little Thompson River Bridge |
| Littleton Main Street |
| Lost Trail Station |
| Lyons Railroad Depot |
| Main Avenue Historic District |
| Main Street Bridge |
| Maitland Arroyo Bridge |
| Marcia (pullman car) |
| Martin Mining Complex |
| McAllister House |
| Midland Terminal Railroad Depot |
| Midland Terminal Railroad Roundhouse |
| Midway House |
| Moffat Station |
| Morley Bridge |
| Morrison Historic District |
| Motor Coach Division Building-Denver Tramway Company |
| Navajo Hogan |
| Northern Colorado Power Company Substation |
| North Fork Historic District |
| North St. Vrain Creek Bridge |
| Pacific Express Stable |
| Petticrew Stage Stop |
| Plum Bush Creek Bridge |
| Rim Rock Drive Historic District |
| Rio Grande Engine No. 168 |
| Rio Grande Southern Railroad Engine No. 20 |
| Rio Grande Southern Railroad, Motor No. 2 |
Data from United States Park Service and Wikidata
