The Interstate 25 reference article from the English Wikipedia on 24-Apr-2004
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Interstate 25

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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.

Table of contents
1 Length
2 Major Cities Along the Route
3 Intersections with other Interstates
4 Spur Routes
5 Notes

Length

Major Cities Along the Route

Intersections with other Interstates


Spur Routes

Notes

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.