Half Marathons in Colorado — 2026

There are 80 half marathons in Colorado scheduled for 2026. The next is the Mancos Cowboy Half Marathon, 5K, and Fun Run in Mancos on October 24. Colorado half marathons run primarily October through February.

Running Scared 5K/13K - Colorado Springs

Sun, Oct 18 · Colorado Springs, CO Colorado Springs

Scaredy Cat 5KVirtual Scaredy Cat 5KScaredy Cat 5K-No Shirt +5

From $30 Open Closing Soon

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Fall Skyline Traverse

Sat, Oct 24 · Boulder, CO Boulder

Fall Skyline Traverse

From $25 Open 100 spots left

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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

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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 Closed

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

Sat, Oct 31 · Centennial, CO Centennial

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

From $30 Closed

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RMRR November 5k/15k

Sun, Nov 1 · Denver, CO Denver

5k15k

From $10 Open Closing Soon

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All-Out Kooky-Spooky

Sun, Nov 1 · Golden, CO Golden

VIRTUAL 5K5K10K +3

From $20 Open Closing Soon

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Friday The 13K - Castle Rock MEET UP

Fri, Nov 13 · Castle Rock, CO Castle Rock

6.5 K13K

From $35 Open

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

Sat, Nov 14 · Aurora, CO Aurora

5K-Active Duty5K-Mail Me My Swag5K-Veteran +12

From $0 Open

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

Sat, Nov 14 · 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

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

Sat, Nov 14 · Centennial, CO Centennial

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

From $30 Open

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

Sun, Nov 15 · Colorado Springs, CO Colorado Springs

Virtual 5K5K-Mail Me My Swag5K-Active Duty +12

From $0 Open

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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 Closing Soon

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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/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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

Sat, Nov 28 · Centennial, CO Centennial

Family 1 Mile Fun RunVirtual Run Registration5K Registration +3

From $30 Open

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All-Out Fa La La

Sat, Dec 5 · Westminster, CO Westminster

5KVIRTUAL 5KVIRTUAL 10K +3

From $20 Open

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

Sat, Dec 5 · Colorado Springs, CO Colorado Springs

Toddlers Chasing SantaToddlers Chasing SantaChasing Santa 5k KIDS 15 yrs and under +13

From $0 Open

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Rock Canyon Half Marathon- 40th Anniversary Run!

Sun, Dec 6 · Pueblo, CO Pueblo

Mini Rock Canyon 5k1/2 marathon

From $35 Open

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

Sat, Dec 12 · 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

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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)5K Registration +3

From $30 Open

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

Sat, Dec 26 · Centennial, CO Centennial

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

From $30 Open

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

Sat, Dec 26 · 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

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All-Out Polar Prowl

Sat, Jan 9 · Arvada, CO Arvada

VIRTUAL 5K5KVIRTUAL 10K +3

From $20 Open

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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

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

Sat, Jan 16 · Centennial, CO Centennial

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

From $30 Open

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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

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

Sat, Jan 16 · Centennial, CO Centennial

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

From $30 Open

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

Sat, Jan 23 · Colorado Springs, CO Colorado Springs

Virtual 5K5K5K-No Shirt +6

From $25 Open

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Run for Donut DENVER/AURORA

Sat, Jan 30 · Centennial, CO Centennial

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

From $30 Open

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Coffee Lover Run DENVER/AURORA

Sat, Jan 30 · Centennial, CO Centennial

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

From $30 Open

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All-Out Mardi Crawl

Sat, Feb 6 · Arvada, CO Arvada

5K5KVIRTUAL 5K +9

From $20 Open

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Run for Chocolate 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

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

Sat, Feb 13 · Centennial, CO Centennial

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

From $30 Open

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

Sun, Feb 14 · Colorado Springs, CO Colorado Springs

5KHalf Marathon

From $35 Open Closing Soon

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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

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Run For Mental Health DENVER/AURORA

Sat, Feb 27 · Centennial, CO Centennial

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

From $30 Open

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Run Together Against Breast Cancer DENVER/AURORA

Sat, Feb 27 · Centennial, CO Centennial

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

From $30 Open

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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

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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

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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

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St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA

Sat, Mar 20 · Centennial, CO Centennial

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

From $30 Open

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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

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All-Out Spring Fever

Sun, Mar 21 · Golden, CO Golden

VIRTUAL 5KVIRTUAL 5K5K +9

From $20 Open

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Always Hope Easter Run DENVER/AURORA

Sat, Mar 27 · Centennial, CO Centennial

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

From $30 Open

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SuperHeroes Run DENVER/AURORA

Sat, Mar 27 · Centennial, CO Centennial

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

From $30 Open

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

Sat, Apr 10 · Centennial, CO Centennial

Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

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

Sat, Apr 10 · Centennial, CO Centennial

Family 1 Mile Fun Run5K RegistrationVirtual Run Registration +3

From $30 Open

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

Sat, Apr 10 · Colorado Springs, CO Colorado Springs

Virtual 6K6KVirtual 6K +13

From $35 Closed

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Platte River Half-Marathon, Relay & 5k

Sun, Apr 11 · Littleton, CO Littleton

2027 5k5k5k +6

From $35 Open Closing Soon

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Spring Fling Prairie Dog Half, 10k, & 5k

Sun, Apr 11 · Arvada, CO Arvada

5k5k10k +3

From $25 Open

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