Sitemap to all pages covering the state of Colorado. Many thanks to David Wilson, Joe Lockhart, Kenyon Schuett and Matthew Salek for accompanying us on these roadtrips through the Centennial State. Photography contributions by Alex Nitzman, Andy Field and Brent Ivy.
Photo Guides
City / Area Guides
City / Area Guides
Interstates
Interstates- Interstate 25
- Interstate 70
- Interstate 76
Interstate 225- Interstate 270
- Business Spur I-25 – Aguilar
- Business Loop I-25 – Walsenburg
- Business Loop I-70 – Grand Junction / Clifton
- Business Spur I-70 – Silt
- Business Spur I-70 – Eagle
- Business Spur I-70 – Edwards
- Former Business Loop I-70 – Idaho Springs
- Business Loop I-70 – Golden, Denver, Aurora
- Business Spur I-70 – Watkins
- Business Loop I-70 – Limon
- Business Loop I-70 – Burlington
- Business Spur I-76 – Keenesburg
- Business Loop I-76 – Fort Morgan to Sterling
Interstate 25
Interstate 70
Interstate 76
Interstate 225
Interstate 270
Business Spur I-25 – Aguilar
Business Loop I-70 – Grand Junction / Clifton
Business Spur I-76 – Keenesburg U.S. Highways
U.S. Highways
U.S. 6
U.S. 24
U.S. 34
U.S. 36
U.S. 40
U.S. 50
U.S. 85
U.S. 138
U.S. 160
U.S. 285
U.S. 287
U.S. 350
U.S. 385
U.S. 400
U.S. 24 Business – Manitou Springs State Highways
State Highways
SH 2
SH 8
SH 9
SH 13
SH 14
SH 30
SH 35
SH 58
SH 67
SH 74
SH 75
SH 83
SH 88
SH 93
SH 103
SH 113
SH 115
SH 121
SH 131
SH 141
SH 224
SH 470
E-470
Eagle/Grand County Road 1 – Trough RoadWith some exceptions, Colorado Department of Transportation (CDOT) generally does not sign overlaps. Instead shared alignments across the state are inventoried as one route. This results in several disconnected segments of U.S. and State Highways, with implied overlaps using other routes. Such is the case with U.S. 6, where 13 segments make up the overall 467.28 mile route across the state. The route is not posted along Interstate 70, which replaced it throughout the Rocky Mountains. Figures cited throughout the site were obtained from the CDOT Straight Line Diagram Tool.
Population Statistics
| State Population | |||||
|---|---|---|---|---|---|
| 5,773,714 | |||||
| Metropolitan Populations | |||||
| Denver-Aurora- Lakewood |
2,963,821 | Colorado Springs | 755,105 | Fort Collins | 359,066 |
| Boulder | 330,758 | Greeley | 328,981 | Pueblo | 168,162 |
| Top County Populations | |||||
| El Paso | 730,395 | Denver | 715,522 | Arapahoe | 655,070 |
| Jefferson | 582,910 | Adams | 519,572 | Larimer | 359,066 |
| Douglas | 357,978 | Boulder | 330,758 | Weld | 328,981 |
| Top City Populations | |||||
| Denver | 735,538 | Colorado Springs | 482,131 | Aurora | 387,377 |
| Fort Collins | 1168,234 | Lakewood | 157,429 | Thornton | 148,113 |
| Arvada | 121,936 | Westminster | 115,046 | Pueblo | 112,751 |
| Centennial | 110,156 | Greeley | 108,958 | Boulder | 107,645 |
| Sources: 2020 U.S. Census Data (metro populations and counties), 2020 U.S. Census Estimate (cities) | |||||
About Colorado
- Capital:
Denver - Nickname: Centennial State
- Colorado has an average elevation of 6,800 feet above sea level
- Over 50 mountain peaks in Colorado are over 14,000 feet above sea level (referred to as the “fourteeners”)
- Area: 104,093.57 square miles or 269,596 square kilometers, 8th largest
- Statehood: 38th state; admitted August 1, 1876
- Total Interstate Mileage: 951.85 miles
- Highest Point: Mount Elbert (southwest of Leadville and east of Aspen) 14,433 Feet above Sea Level
DenverUpdated March 3, 2024.