Half Marathons in Colorado — 2026

There are 80 half marathons in Colorado scheduled for 2026. The next is the Westy Half & 5k in Westminster on October 11. Colorado half marathons run primarily October through February.

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 10 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Closed

Register →

Cookie Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 10 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)Virtual Run Registration +3

From $30 Closed

Register →

Westy Half & 5k

Sun, Oct 11 · Westminster, CO Westminster

5kHalf Marathon

From $30 Open Closing Soon

Register →

Running Scared 5K/13K - Denver

Sat, Oct 17 · Littleton, CO Littleton

Scaredy Cat 5K-No ShirtVirtual Scaredy Cat 5KScaredy Cat 5K +5

From $30 Open Closing Soon

Register →

Running Scared 5K/13K - Colorado Springs

Sun, Oct 18 · Colorado Springs, CO Colorado Springs

Virtual Scaredy Cat 5KScaredy Cat 5K-No ShirtScaredy Cat 5K +5

From $30 Open Closing Soon

Register →

Mancos Cowboy Half Marathon, 5K, and Fun Run

Sat, Oct 24 · Mancos, CO Mancos

Mancos 5KMancos Cowboy Half Marathon

From $25 Open Closing Soon 74 spots left

Register →

Fall Skyline Traverse

Sat, Oct 24 · Boulder, CO Boulder

Fall Skyline Traverse

From $25 Open Closing Soon 100 spots left

Register →

PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 31 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

Register →

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Sat, Oct 31 · Centennial, CO Centennial

Family 1 Mile Fun Run5K Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

Register →

All-Out Kooky-Spooky

Sun, Nov 1 · Golden, CO Golden

VIRTUAL 5K5KVIRTUAL 10K +3

From $20 Open Closing Soon

Register →

RMRR November 5k/15k

Sun, Nov 1 · Denver, CO Denver

5k15k

From $10 Open

Register →

Friday The 13K - Castle Rock MEET UP

Fri, Nov 13 · Castle Rock, CO Castle Rock

6.5 K13K

From $35 Open

Register →

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Sat, Nov 14 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K Registration +3

From $30 Open

Register →

Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Sat, Nov 14 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K Registration +3

From $30 Open

Register →

Salute to Veterans 5K/10K/Half Marathon - Denver

Sat, Nov 14 · Aurora, CO Aurora

5K-Active Duty5K5K-Mail Me My Swag +12

From $0 Open

Register →

Salute to Veterans 5K/10K/Half Marathon - Colorado Springs

Sun, Nov 15 · Colorado Springs, CO Colorado Springs

5K5K-Active Duty5K-Mail Me My Swag +12

From $0 Open

Register →

TURKEY TREK (13.1, 10k, 5k & 2k)

Sat, Nov 21 · Arvada, CO Arvada

2k Turkey Toddle (un-timed)5k Turkey Trot10k Turkey Trek +1

From $26 Open

Register →

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Sat, Nov 28 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA

Sat, Nov 28 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K Registration +3

From $30 Open

Register →

All-Out Fa La La

Sat, Dec 5 · Westminster, CO Westminster

5KVIRTUAL 5KVIRTUAL 10K +3

From $20 Open

Register →

Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law Group

Sat, Dec 5 · Colorado Springs, CO Colorado Springs

Adult Chasing Santa 5kChasing Santa 5k KIDS 15 yrs and underToddlers Chasing Santa +5

From $0 Open

Register →

Rock Canyon Half Marathon- 40th Anniversary Run!

Sun, Dec 6 · Pueblo, CO Pueblo

Mini Rock Canyon 5k1/2 marathon

From $35 Open

Register →

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Sat, Dec 12 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)Virtual Run Registration +3

From $30 Open

Register →

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Sat, Dec 12 · Centennial, CO Centennial

Family Fun Run 1 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +3

From $30 Open

Register →

New Year's Run 5K/10K/13.1 DENVER/AURORA

Sat, Dec 26 · Centennial, CO Centennial

Family Fun Run 1 Mile5K Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

Register →

A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA

Sat, Dec 26 · Centennial, CO Centennial

Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

Register →

Winter Series - The Coolest Race in Town!

Sat, Jan 9 · Colorado Springs, CO Colorado Springs

WS II Short: Cheyenne Mountain State ParkWS II Short: Cheyenne Mountain State ParkWS I Short: Garden of the Gods / Red Leg Brewing Company +17

From $40 Open

Register →

All-Out Polar Prowl

Sat, Jan 9 · Arvada, CO Arvada

VIRTUAL 5K5K10K +3

From $20 Open

Register →

ALMAGEDDON Winter Triathlon presented by the Alma Foundation

Sat, Jan 16 · Alma, CO Alma

ALMAGEDDON Winter TriathlonALMAGeddon Winter Triathlon Relay

From $40 Open 60 spots left

Register →

MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA

Sat, Jan 16 · Centennial, CO Centennial

Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Sat, Jan 16 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

Register →

Chilly Willy 5K/10K/Half Marathon - Colorado Springs

Sat, Jan 23 · Colorado Springs, CO Colorado Springs

5K-No Shirt5KVirtual 5K +6

From $25 Open

Register →

Coffee Lover Run DENVER/AURORA

Sat, Jan 30 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K Registration +3

From $30 Open

Register →

Run for Donut DENVER/AURORA

Sat, Jan 30 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

All-Out Mardi Crawl

Sat, Feb 6 · Arvada, CO Arvada

VIRTUAL 5K5KVIRTUAL 5K +9

From $20 Open

Register →

Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Sat, Feb 13 · Centennial, CO Centennial

Family Fun Run 1 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +3

From $30 Open

Register →

Valentine's Day Run 5K/10K/13.1 DENVER/AURORA

Sat, Feb 13 · Centennial, CO Centennial

Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

The Toyota Super Half Marathon™& Game Day 5K™

Sun, Feb 14 · Colorado Springs, CO Colorado Springs

5KHalf Marathon

From $35 Open

Register →

2027 C.O.P.S. WINTER RACE SERIES

Wed, Feb 17 · Golden, CO Golden

C.O.P.S. 5K ReduxC.O.P.S. 5KC.O.P.S. 5K +10

From $30 Closed

Register →

Run For Mental Health DENVER/AURORA

Sat, Feb 27 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K Registration +3

From $30 Open

Register →

Run Together Against Breast Cancer DENVER/AURORA

Sat, Feb 27 · Centennial, CO Centennial

Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)Virtual Run Registration (5K/10K/13.1) +3

From $30 Open

Register →

Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

Sat, Mar 6 · Denver, CO Denver

1 Mile1 Mile5k +11

From $17 Open 5 spots left

Register →

Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs

Sun, Mar 7 · Colorado Springs, CO Colorado Springs

1 Mile1 Mile5K +11

From $17 Open 5 spots left

Register →

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Sun, Mar 14 · Severance, CO Severance

Kids Fun RunKids Fun RunLucky Brew 5K +7

From $15 Open

Register →

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Sat, Mar 20 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

All-Out Spring Fever

Sun, Mar 21 · Golden, CO Golden

5KVIRTUAL 5K5K +9

From $20 Open

Register →

SuperHeroes Run DENVER/AURORA

Sat, Mar 27 · Centennial, CO Centennial

Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

Register →

Run Through The Decades 6K/7K/8K/Half - Colorado Springs

Sat, Apr 10 · Colorado Springs, CO Colorado Springs

Virtual 6KVirtual 6K6K +13

From $35 Closed

Register →

Run for PB&J 5k/10k/13.1 DENVER/AURORA

Sat, Apr 10 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

Sloth Run 5K/10K/13.1 DENVER/AURORA

Sat, Apr 10 · Centennial, CO Centennial

Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)Virtual Run Registration +3

From $30 Open

Register →