List of Interstate Highways in Colorado
| Interstate Highways in Colorado | |
|---|---|
Standard highway markers for Interstate 70, Interstate 225, and Interstate 76 Business | |
| Highway names | |
| Interstates | Interstate X (I-X) |
| Business routes: | Interstate X Business (I-X Bus.) |
| System links | |
| |
Mainline highways
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-25
|
305.04 | 490.91 | I-25 at the New Mexico state line | I-25 at the Wyoming state line | — | — | ||
 I-70
|
449.51 | 723.42 | I-70 at the Utah state line | I-70 at the Kansas state line | — | — | ||
 I-76
|
183.99 | 296.10 | I-70 in Arvada | I-76 at the Nebraska state line | — | — | ||
 I-225
|
11.99 | 19.30 | I-25 in Denver | I-70 in Aurora and Denver | — | — | ||
 I-270
|
5.35 | 8.61 | US 36 and I-25 in unincorporated Adams County | I-70 in Denver | — | — | ||
Business routes
 |
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-25 BL
|
1.94 | 3.12 | Aguilar | — | — | |||
| I-25 BL
|
3.94 | 6.34 | Walsenburg | — | — | |||
| I-25 BL
|
6.75 | 10.86 | Colorado Springs | — | — | |||
 I-70 BL
|
13.36 | 21.50 | Grand Junction | Clifton | — | — | ||
| I-70 BL
|
0.17 | 0.27 | Silt | — | — | |||
| I-70 BL
|
0.27 | 0.43 | Eagle | — | — | |||
| I-70 BL
|
0.52 | 0.84 | Edwards | — | — | |||
| I-70 BL
|
2.54 | 4.09 | Idaho Springs | — | — | |||
| I-70 BL
|
26.80 | 43.13 | West Pleasant View | Aurora | — | — | Also serves Lakewood and Denver | |
| I-70 BL
|
0.31 | 0.50 | Watkins | — | — | |||
| I-70 BL
|
0.30 | 0.48 | Strasburg | — | — | |||
| I-70 BL
|
0.31 | 0.50 | Deer Trail | — | — | |||
| I-70 BL
|
0.30 | 0.48 | Agate | — | — | |||
| I-70 BL
|
2.80 | 4.51 | Limon | — | — | |||
| I-70 BL
|
0.51 | 0.82 | Vona | — | — | |||
| I-70 BL
|
1.80 | 2.90 | Burlington | — | — | |||
 I-76 BL
|
0.30 | 0.48 | Keenesburg | — | — | |||
| I-76 BL
|
50.00 | 80.47 | Fort Morgan | Sterling | — | — | Also serves Brush, Hillrose, Merino, and Atwood | |
