Colorado Half Marathons

Each half marathon that takes place in Colorado is listed below, and when you click the link you’ll find info for each race — what the course is like and a map of the route, the elevation change, whether it’s fast and flat or hilly and challenging, how to sign up, and more.


You’ll also find contact info if you’re having problems with your registration or need to contact the race directors.

See also: 2017-2018 Calendar of Colorado Half Marathons

Arvada

9/11 Remembrance Run Half Marathon, 10K & 5K

All-Out Polar Prowl Half Marathon, 10K & 5K

All-Out Summer Breeze Half Marathon, 10K & 5K

Aspen

Aspen Valley Marathon, Half Marathon & 5K

Golden Leaf Half Marathon

Basalt

Basalt Half Marathon

Buena Vista

Autumn Color Run Half Marathon, 10K & 5K

Boulder

Boulder Backroads Marathon, Half Marathon & 10K

Boulder Spring Half Marathon, 10-Mile & 10K

Heart & Sole Half Marathon

Breckenridge

Breck Crest Mountain Marathon & Half Marathon

Breckenridge Hunky Dory Half Marathon

Castle Rock

Area 13.1 Half Marathon & Terrestrial 5K

Castle Rock Half Marathon, 5-Mile & Rock Challenge

Colorado National Monument

Rim Rock Marathon & Half Marathon

Colorado Springs

American Discovery Trail Marathon & Half Marathon

Big Mountain Trail Run Half Marathon, 10K & 5K

Colorado Springs Marathon, Half Marathon & 5K

Pikes Peak Ascent Half Marathon

Super Half Marathon & 5K Family Run/Walk

Xterra Trail Run Marathon, Half Marathon & 5K

ZOOMA Colorado Half Marathon & 10K

Copper Mountain

Copper Mountain Half Marathon

Creede

Runoff Runoff Marathon, Half Marathon & 6K

Crested Butte

Crested Butte Fall Color Classic Half Marathon

Denver

Colfax Marathon, Half Marathon, Relay & Urban 10-Miler

Denver Half Marathon

Race for Open Space Half Marathon, 5K & 10K

Rock & Roll Denver Marathon & Half Marathon

Rocky Mountain Half Marathon

Durango

Steamworks Animas Valley Half Marathon

Thirsty 13 Half Marathon

Empire

Devil on the Divide Half Marathon & 50K

Erie

Redline 13.1 Erie Half Marathon & 5K

Estes Park

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

Rocky Mountain Half Marathon

Evergreen

Revel Rockies Marathon & Half Marathon

Fort Collins

Blue Sky Marathon & Half Marathon

Colorado Marathon, Half Marathon, 5K & 10K

Crossroads Half Marathon & 5K

Equinox Half Marathon & 5-Mile Run

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 & 10K

Mountain to Valley Half Marathon, 4-Mile & 1/2-Mile

Golden

Mine Shaft Half

Grand Junction

DreamCatcher Half Marathon

Highlands Ranch

Highlands Ranch Half Marathon & 5K

Wildcat Mountain Half Marathon

Keystone

Keystone Half Marathon, 10K, 5K & Kids Run

Lake City

Mountaineer Marathon & Half Marathon

Lakewood

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

Mount Carbon Trail Half Marathon & North Park Trail 5K

Leadville

Turquoise Lake Half Marathon

Littleton

Denver Trail Half Marathon & 10K

Fear the Deer Trail Half Marathon

Platte River Half Marathon & Buckhorn Exchange Relay

Longmont

American Heroes Run Marathon, Half Marathon, Relay, Ultra & 5K

Longmont Half Marathon & 5K

Louisville

Taste of Louisville Half Marathon, 5K & Kids Run

Loveland

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

Manitou Springs

Pikes Peak Ascent Half Marathon

Pagosa Springs

Devil Mountain Ultra 50-Mile, 50K & Half Marathon

Mountain Chile Cha Cha 5K, 10K & Half Marathon

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

Arkansas River Bluegrass Marathon & Half Marathon

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

Silverton

Kendall Mountain Run Marathon & Half Marathon

Steamboat Springs

Mountain Madness Half Marathon

Steamboat Marathon, Half Marathon & 10K Run/Walk

Trinidad

Bulldog Run Half Marathon, 10K & 5K

Run for the Fallen Coal Miners Half Marathon, 10K & 5K

Vail

Cruxy Half Marathon

La Sportiva Vail Half Marathon

Teva Mountain Games Vail Pass Half Marathon

Westminster

All-Out Fa La La Half Marathon, 10K & 5K

Dog Days Half Marathon, 10K & 5K

Redline 13.1 Westminster Half Marathon & 5K Run/Walk

Winter Park

Winter Park Half Marathon & 5K