Denver Colfax Half Marathon

The Denver Colfax Half Marathon offers a unique urban running experience in the heart of Colorado’s capital. Starting near City Park, the course takes runners through diverse neighborhoods, a fire station (yes, really!), and even onto Colfax Avenue, the longest commercial street in the U.S. The mile-high altitude adds an extra challenge, but the stunning Rocky Mountain backdrop makes it all worthwhile. With a mix of city streets, park paths, and enthusiastic onlookers, this half marathon is an u