Aspen

Vasque Golden Leaf Half Marathon


Aurora

Colorado Colfax Marathon & Half Marathon


Basalt

Basalt Half Marathon


Buena Vista

Autumn Color Runs


Boulder

Boulder Marathon, Half Marathon & Relay

Boulder Spring Half Marathon, 10-Mile & 10K

Heart & Sole Half Marathon


Breckenridge

Breck Crest Mountain Marathon & Half Marathon


Colorado Springs

American Discovery Trail Marathon & Half Marathon

Pikes Peak Ascent Half Marathon

ZOOMA Colorado Half Marathon & 10K


Copper Mountain

Copper Mountain Half Marathon


Denver

Denver Half Marathon

Rock & Roll Denver Marathon, Half Marathon & Relay

Rocky Mountain Half Marathon


Durango

Steamworks Animas Valley Half Marathon


Estes Park

Estes Park Marathon & Half Marathon, 10K & 5K


Fort Collins

Blue Sky Marathon & Half Marathon

Colorado Marathon, Half Marathon, 5K & 10K

Crossroads Half Marathon & 5K

Horsetooth Half Marathon


Red Mountain Trail Race Half Marathon



Frisco

Run The Rockies Half Marathon


Gateway

4th of July Half Marathon & 5K

The Better 1/2 Half Marathon & 5-Mile Run


Georgetown

Georgetown to Idaho Springs Half Marathon

Slacker Half Marathon


Glenwood Springs

Glenwood Canyon Shuffle Race for Literacy

Glenwood Springs Half Marathon


Highlands Ranch

Wildcat Mountain Half Marathon


Lakewood

The Bear Chase Trail Half Marathon, 50K, 10K & 50-Miler


Leadville

Turquoise Lake Half Marathon


Littleton

Platte River Half Marathon & Buckhorn Exchange Relay


Loveland

Heart Center of the Rockies Half Marathon, 10K & 5K


Pagosa Springs

Devil Mountain 50K, Half Marathon & Kids Race

Turkey Track Trail Marathon & Half Marathon


Palisade

Grand Valley Marathon, Half Marathon, 10K & 5K


Pueblo

Rock Canyon Half Marathon


Ridgway

Mount Sneffels Half Marathon


Salida

Run Through Time Marathon, Half Marathon & 2-Mile Run


Steamboat Springs

Mountain Madness Half Marathon

Steamboat Marathon, Half Marathon & 10K Run/Walk


Vail

La Sportiva Vail Half Marathon

Teva Mountain Games Vail Pass Half Marathon