Colorado Half Marathon Races
Upcoming half marathon races in Colorado, sorted by date.
Nov 2026
Run for Mental Health 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Salute to Veterans 5K/10K/Half Marathon - Denver
Aurora, CO · Virtual option · from $15
Salute to Veterans 5K/10K/Half Marathon - Colorado Springs
Colorado Springs, CO · Virtual option · from $15
TURKEY TREK (13.1, 10k, 5k & 2k)
Arvada, CO · from $39
Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
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Dec 2026
All-Out Fa La La
Westminster, CO · Virtual option · from $35
Rock Canyon Half Marathon- 40th Anniversary Run!
Pueblo, CO · from $35
Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
New Year's Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Jan 2027
Keep Going Run VIRTUAL COLORADO SPRINGS 5K/10K/13.1
Virtual · from $25
All-Out Polar Prowl
Arvada, CO · Virtual option · from $35
MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Chilly Willy 5K/10K/Half Marathon - Colorado Springs
Colorado Springs, CO · Virtual option · from $30
Coffee Lovers Run DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run for Donuts DENVER/AURORA
Centennial, CO · Virtual option · from $30
Feb 2027
All-Out Mardi Crawl
Arvada, CO · Virtual option · from $35
Northbound Run VIRTUAL COLORADO SPRINGS 5K/10K/13.1
Virtual · from $25
Stories Trail Runs
Colorado Springs, CO · from $60
Old Man Winter Bike Rally & Run
Lyons, CO · from $55
Valentine's Day Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run for Chocolate 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
The Toyota Super Half Marathon™& Game Day 5K™
Colorado Springs, CO · from $35
Ralston Creek Half Marathon & 5k
Arvada, CO · from $25
Run Together Against Breast Cancer DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run For Mental Health DENVER/AURORA
Centennial, CO · Virtual option · from $30
Mar 2027
Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver
Denver, CO · Virtual option · from $17
Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
22nd Annual Run Through Time Trail Marathon and Half Marathon
Salida, CO · from $15
Lucky Brew Race 5K, 10K, 15k & Half Marathon
Severance, CO · from $20
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
All-Out Spring Fever
Golden, CO · Virtual option · from $25
Spring Equinox
Wellington, CO · Virtual option · from $35
Always Hope Easter Run DENVER/AURORA
Centennial, CO · Virtual option · from $30
SuperHeroes Run DENVER/AURORA
Centennial, CO · Virtual option · from $30
Apr 2027
Three Creeks Half Marathon
Englewood, CO · from $65
Sloth Run 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run for PB&J 5k/10k/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run Through The Decades 6K/7K/8K/Half - Colorado Springs
Colorado Springs, CO · Virtual option · from $30
Platte River Half-Marathon, Relay & 5k
Littleton, CO · from $50
Spring Fling Prairie Dog Half, 10k, & 5k
Arvada, CO · from $39
Horsetooth Half Marathon - Presented by Fort Collins Connexion
Fort Collins, CO · from $95
Coffee Lovers Run DENVER/AURORA
Centennial, CO · Virtual option · from $30
Run for Donuts DENVER/AURORA
Centennial, CO · Virtual option · from $30
All-Out Beat the Heat
Westminster, CO · Virtual option · from $25
DoNot Stop Half Marathon/5K/10K - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
Bigfoot Half Marathon
Estes Park, CO · from $30
DoNot Stop Half Marathon/5K/10K - Denver
Denver, CO · Virtual option · from $17
May 2027
Longmont Half & 5k (LM Half)
Longmont, CO · from $39
The Colorado Marathon
Fort Collins, CO · from $50
Run for Chocolate 5k/10k/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Hometown Half Marathon/5K/10K - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
Hometown Half Marathon/5K/10K - Denver
Denver, CO · Virtual option · from $17
Super Mom 5K/10K/Half - Colorado Springs
Colorado Springs, CO · Virtual option
Farish Trail Race
Woodland Park, CO · from $50
SuperHeroes Run DENVER/AURORA
Centennial, CO · Virtual option · from $30
Jun 2027
Steamboat Marathon
Steamboat Springs, CO · from $65
Colorado 13er (Half Marathon/10k/5k)
Louisville, CO · from $39
All-Out Summer Breeze
Arvada, CO · Virtual option · from $20
Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA
Centennial, CO · Virtual option · from $30
Red, White and Brew 5k, 10k & Half Marathon
Windsor, CO · from $18
Race in the Clouds - Alma Dirt Festival 2027
Alma, CO · from $40
Slacker Half Marathon-Relay-4-Mile Races
Georgetown, CO · Virtual option
Jul 2027
All-Out Dog Days
Westminster, CO · Virtual option · from $20
Heatwave Half Marathon/5K/10K - Denver
Denver, CO · Virtual option · from $17
Summer Splash Prairie Dog Half, 10k, & 5k
Castle Rock, CO · from $39
Heatwave Half Marathon/5K/10K - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
Christmas 5K/10K/Half Marathon in July Meet Up - Denver
Virtual
Popsicle 5K/10K/Half - Colorado Springs
Colorado Springs, CO · Virtual option
Aug 2027
Bound for Boston Marathon & Half Marathon - Denver
Denver, CO · Virtual option
All-Out Runapalooza
Arvada, CO · Virtual option · from $20
Erie Half & 5k
Erie, CO · from $39
Byers Peak Stampede Half Marathon & 5K Run
Fraser, CO · from $45
Pioneer Prairie Dog Half, 10k & 5k
Westminster, CO · from $39
TBK Bank Thirsty 13 Half Marathon
Durango, CO
Sep 2027
Labor Day Half Marathon
Parker, CO · Virtual option · from $30
Golden Harvest Half Marathon & 5K/10K - Denver
Denver, CO · Virtual option · from $17
Golden Harvest Half Marathon & 5K/10K - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
Autumn Run
Buena Vista, CO
All-Out Fall Fest
Westminster, CO · Virtual option · from $20
Oct 2027
Spooky Sprint - Denver
Denver, CO · Virtual option · from $20
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, CO · Virtual option · from $12
Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run
Windsor, CO · from $25
Spooky Sprint - Colorado Springs
Colorado Springs, CO · Virtual option · from $17
Westy Half & 5k
Westminster, CO · from $39
All-Out Kooky-Spooky
Golden, CO · Virtual option · from $20
Feb 2034
Race listings come from RunSignup. Dates, prices and details can change, so confirm on the race's registration page.