Half Marathons in Colorado — 2026

There are 74 half marathons in Colorado scheduled for 2026. The next is the Barr Trail Mountain Race in Manitou Springs on July 19. Colorado half marathons run primarily July through February.

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 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +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 Registration5K/10K/13.1 Eco-Registration (No Shirt) +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 Mile5K RegistrationVirtual Run Registration (5K/10K/13.1) +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 Registration5K/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

5KVIRTUAL 5KVIRTUAL 10K +3

From $20 Open

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

Sat, Jan 16 · Centennial, CO Centennial

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

From $30 Open

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

From $30 Open

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ALMAGEDDON Winter Triathlon presented by the Alma Foundation

Sat, Jan 16 · Alma, CO Alma

ALMAGEDDON Winter Triathlon

From $40 Open 75 spots left

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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

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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

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All-Out Mardi Crawl

Sat, Feb 6 · Arvada, CO Arvada

5KVIRTUAL 5KVIRTUAL 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 MileVirtual Run Registration (5K/10K/13.1)5K Registration +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 Closed

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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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All-Out Spring Fever

Sun, Mar 21 · Golden, CO Golden

VIRTUAL 5K5K5K +9

From $20 Open

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Platte River Half-Marathon, Relay & 5k

Sun, Apr 11 · Littleton, CO Littleton

2027 5k5k5k +6

From $35 Closed

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Horsetooth Half Marathon - Presented by Fort Collins Connexion

Sun, Apr 18 · Fort Collins, CO Fort Collins

Half MarathonHalf Marathon

From $75 Open Closing Soon

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All-Out Beat the Heat

Sat, Apr 24 · Westminster, CO Westminster

5KVIRTUAL 5KVIRTUAL 5K +9

From $20 Open

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Bigfoot Half Marathon

Sat, Apr 24 · Estes Park, CO Estes Park

5K Run/Walk5K Run/WalkHalf Marathon +1

From $45 Open

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Colorado 13er (Half Marathon/10k/5k)

Sun, Jun 6 · Louisville, CO Louisville

5k5k10k +3

From $30 Closed

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All-Out Summer Breeze

Sat, Jun 12 · Arvada, CO Arvada

5KVIRTUAL 5K5K +9

From $20 Open

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50 States Half Marathon Club General Membership

Fri, Feb 10 · Colorado Springs, CO Colorado Springs

50 States Half Marathon Club General Membership

From $85 Open

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Fifty States Half Marathon Club Life Membership

Sat, Feb 11 · Colorado Springs, CO Colorado Springs

Fifty States Half Marathon Club Life Membership

From $429 Open

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