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Interstate 25 is an interstate highway in the western United States. Like other "interstates," it is commonly referred to as I-25. Its odd number indicates that it is primariliy a north-south highway. It goes from Interstate 10 at Las Cruces, New Mexico to Interstate 90 in Buffalo, Wyoming.
| Miles | km | ||
| 462 | 748 | New Mexico | |
| 300 | 486 | Colorado | |
| 301 | 488 | Wyoming | |
| 1,063 | 1,722 | Total | |
It is the main north-south highway through Colorado, passing through Cheyenne, Wyoming, near Ft. Collins, Colorado, through Denver, Colorado, Castle Rock, Colorado, Colorado Springs, Colorado, Pueblo, Colorado and over Raton Pass into New Mexico. The I-25 corridor in Colorado is heavily urbanized, passing just east of the Front Range of the Rocky Mountains.
| Primary Interstate Highways | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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