A major interstate in the western United States running from Interstate 10 in Las Cruces, New Mexico to Interstate 90 in Buffalo, Wyoming. It passes through 3 states; New Mexico, Colorado, and Wyoming, as well as passes through the cities of Las Cruces, Albuquerque, Santa Fe, Pueblo, Colorado Springs, Denver, Fort Collins, Cheyenne, and Casper.
The portion of the freeway through Colorado is heavily urbanized from Pueblo to Fort Collins and is known as the "Front Range Urban Corridor," which is home to most of Colorado's 5 million people.
The entire length of Interstate 25 is rather scenic, especially the Colorado portion and parts of the roadway through northern New Mexico.
Man, I need to get to Albuquerque from Denver quickly. I know, I'll take Interstate 25, get there fast and be able to look at awesome mountains the whole way!