I25

Interstate 25 (I-25) is a north–south Interstate Highway in the western United States, serving as a major regional corridor from Las Cruces, New Mexico, to Buffalo, Wyoming. The highway passes through three states and connects several large urban centers and state capitals, playing a key role in mobility, commerce, and tourism along the Rocky Mountain front range.

In New Mexico, I-25 begins at the I-10/I-25 junction in Las Cruces and generally moves north through the Albuquerque metropolitan area, continuing toward Santa Fe and the northern reaches of the state. The route is a principal north–south artery for the state and intersects I-40 in Albuquerque, near the city’s notable Big I interchange. In this segment, I-25 provides access to central New Mexico and serves as a conduit for cross-state travel from southern to northern regions.

In Colorado, I-25 travels along the Front Range, linking Pueblo, Colorado Springs, Denver, and Fort Collins. The corridor supports substantial commuter and freight traffic, offering connections to several east–west routes and regional destinations. In Wyoming, I-25 continues north from Colorado into the eastern part of the state, crossing into Cheyenne country and ending at I-90 in Buffalo, where it terminates.

I-25 is a non-tolled highway maintained by the respective state departments of transportation: New Mexico Department of Transportation, Colorado Department of Transportation, and Wyoming Department of Transportation. Its construction occurred in phases from the mid-20th century through the late 20th century, with the completed route establishing a continuous interstate link along the central Rockies.