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    Half Marathon Races in Colorado

    104 upcoming Half Marathon races across Colorado. Run This events are listed first — pick a city below to narrow it down.

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    Cities in ColoradoCentennialColorado SpringsArvadaDenverWestminsterFort CollinsLittleton

    104 races

    Fri, Sep 25, 2026

    Red Feather Trail Jamboree

    Red Feather Lakes, CO

    Outside50.0 mi31.1 miMarathon94.0 mi

    Sat, Sep 26, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Sep 26, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Sep 27, 2026

    Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

    Boulder, CO

    OutsideMarathon5K10K

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    Sun, Sep 27, 2026

    Girls on the Run Rockies Boulderthon SoleMates 2026

    Boulder, CO

    OutsideMarathon10K

    Sat, Oct 3, 2026

    Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

    Canon City, CO

    Outside5K8.0 miMarathon10K

    Sat, Oct 3, 2026

    Spooky Sprint - Denver

    Littleton, CO

    Outside50 m1 mile5K10K

    Sat, Oct 3, 2026

    Colorado Springs Marathon, Half, 5K, and Kids K

    Colorado Springs, CO

    OutsideMarathon5K1000 m

    Sun, Oct 4, 2026

    Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

    Windsor, CO

    OutsideMarathon10K5K1 mile

    Sat, Oct 10, 2026

    Breckenridge RunFest

    Breckenridge, CO

    OutsideMarathon10K5K1 mile

    Sat, Oct 10, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Oct 10, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Oct 10, 2026

    The Long View Marathon

    Fort Collins, CO

    OutsideMarathon5K

    Sun, Oct 11, 2026

    Westy Half & 5k

    Westminster, CO

    OutsideMarathon5K

    Sun, Oct 11, 2026

    Durango Marathon

    Durango, CO

    OutsideMarathon

    Sat, Oct 17, 2026

    Blue Sky Trail Marathon & Half Marathon

    Fort Collins, CO

    Outside26.7 mi13.8 mi

    Sat, Oct 24, 2026

    Mancos Cowboy Half Marathon, 5K, and Fun Run

    Mancos, CO

    OutsideMarathon5K1 mile

    Sat, Oct 31, 2026

    HRCA Backcountry Wilderness Half Marathon

    Lone Tree, CO

    OutsideMarathon

    Sat, Oct 31, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Oct 31, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Nov 1, 2026

    All-Out Kooky-Spooky

    Golden, CO

    OutsideMarathon10K5K

    Sat, Nov 7, 2026

    Turkey Trails- Denver

    Littleton, CO

    Outside50 m1 mile5K10K

    Sun, Nov 8, 2026

    Turkey Trails - Colorado Springs

    Colorado Springs, CO

    Outside50 m1 mile5K10K

    Sat, Nov 14, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Nov 14, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Nov 14, 2026

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

    Aurora, CO

    Outside5K10KMarathon

    Sun, Nov 15, 2026

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

    Colorado Springs, CO

    Outside5K10KMarathon

    Sat, Nov 21, 2026

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

    Arvada, CO

    OutsideMarathon10K5K1.2 mi

    Sat, Nov 28, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Nov 28, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Dec 5, 2026

    All-Out Fa La La

    Westminster, CO

    OutsideMarathon10K5K

    Sun, Dec 6, 2026

    Rock Canyon Half Marathon- 40th Anniversary Run!

    Pueblo, CO

    OutsideMarathon5K

    Sat, Dec 12, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Dec 12, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Dec 26, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Dec 26, 2026

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Jan 9, 2027

    All-Out Polar Prowl

    Arvada, CO

    OutsideMarathon10K5K

    Sat, Jan 9, 2027

    Winter Series - The Coolest Race in Town!

    Colorado Springs, CO

    Outside10K8.0 mi10.0 mi12.4 mi

    Sat, Jan 16, 2027

    ALMAGEDDON Winter Triathlon presented by the Alma Foundation

    Alma, CO

    Outside12.5 mi

    Sat, Jan 16, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Jan 16, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Jan 23, 2027

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

    Colorado Springs, CO

    Outside5K10KMarathon8.1 mi

    Sat, Jan 30, 2027

    Alley Loop

    Crested Butte, CO

    OutsideMarathon10K5K1.9 mi

    Sat, Jan 30, 2027

    Time Travel Half-Marathon/5K/10K - Denver

    Denver, CO

    Outside100 m1 mile5K10K

    Sat, Jan 30, 2027

    Coffee Lover Run DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Jan 30, 2027

    Run for Donut DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Jan 31, 2027

    Time Travel Half-Marathon/5K/10K - Colorado Springs

    Colorado Springs, CO

    Outside100 m1 mile5K10K

    Sat, Feb 6, 2027

    All-Out Mardi Crawl

    Arvada, CO

    OutsideMarathon10K5K

    Sat, Feb 6, 2027

    Stories Trail Runs

    Colorado Springs, CO

    Outside6.7 miMarathon19.6 mi

    Sat, Feb 13, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Feb 13, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Feb 14, 2027

    Ralston Creek Half Marathon & 5k

    Arvada, CO

    OutsideMarathon5K

    Sun, Feb 14, 2027

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

    Colorado Springs, CO

    OutsideMarathon5K

    Sat, Feb 27, 2027

    Run Together Against Breast Cancer DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Feb 27, 2027

    Run For Mental Health DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Mar 6, 2027

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

    Denver, CO

    Outside1 mile5K10KMarathon

    Sun, Mar 7, 2027

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

    Colorado Springs, CO

    Outside1 mile5K10KMarathon

    Sat, Mar 13, 2027

    22nd Annual Run Through Time Trail Marathon and Half Marathon

    Salida, CO

    OutsideMarathon2.0 mi

    Sun, Mar 14, 2027

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

    Severance, CO

    Outside5K10K9.3 mi966 m

    Sat, Mar 20, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Mar 20, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Mar 21, 2027

    All-Out Spring Fever

    Golden, CO

    OutsideMarathon10K5K

    Sun, Mar 21, 2027

    Spring Equinox

    Wellington, CO

    OutsideMarathon5K

    Sat, Mar 27, 2027

    Always Hope Easter Run DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Mar 27, 2027

    SuperHeroes Run DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Apr 4, 2027

    Three Creeks Half Marathon

    Englewood, CO

    OutsideMarathon

    Sat, Apr 10, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Apr 10, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Apr 11, 2027

    Platte River Half-Marathon, Relay & 5k

    Littleton, CO

    OutsideMarathon5K

    Sun, Apr 11, 2027

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

    Arvada, CO

    OutsideMarathon10K5K

    Sun, Apr 18, 2027

    Horsetooth Half Marathon - Presented by Fort Collins Connexion

    Fort Collins, CO

    OutsideMarathon

    Sat, Apr 24, 2027

    All-Out Beat the Heat

    Westminster, CO

    OutsideMarathon10K5K

    Sat, Apr 24, 2027

    DoNot Stop Half Marathon/5K/10K - Colorado Springs

    Colorado Springs, CO

    Outside50 m1 mile5K10K

    Sat, Apr 24, 2027

    Bigfoot Half Marathon

    Estes Park, CO

    OutsideMarathon5K

    Sat, Apr 24, 2027

    Coffee Lover Run DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Apr 24, 2027

    Run for Donut DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, Apr 25, 2027

    DoNot Stop Half Marathon/5K/10K - Denver

    Denver, CO

    Outside50 m1 mile5K10K

    Sun, May 2, 2027

    Longmont Half & 5k (LM Half)

    Longmont, CO

    OutsideMarathon5K

    Sun, May 2, 2027

    The Colorado Marathon

    Fort Collins, CO

    OutsideMarathon10K5K

    Sat, May 8, 2027

    Hometown Half Marathon/5K/10K - Colorado Springs

    Colorado Springs, CO

    Outside50 m1 mile5K10K

    Sat, May 8, 2027

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

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sun, May 9, 2027

    Hometown Half Marathon/5K/10K - Denver

    Denver, CO

    Outside50 m1 mile5K10K

    Sun, Jun 6, 2027

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

    Louisville, CO

    OutsideMarathon10K5K

    Sun, Jun 6, 2027

    The Steamboat Marathon

    Steamboat Springs, CO

    OutsideMarathon10K805 m

    Sat, Jun 12, 2027

    All-Out Summer Breeze

    Arvada, CO

    OutsideMarathon10K5K

    Sat, Jun 12, 2027

    Summits Trail Runs

    Granby, CO

    Outside6.1 mi13.9 mi27.8 mi33.9 mi

    Sat, Jun 19, 2027

    Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

    Centennial, CO

    Outside5K10KMarathon1 mile

    Sat, Jun 19, 2027

    Red, White and Brew 5k, 10k & Half Marathon

    Windsor, CO

    Outside5K10KMarathon1 mile

    Fri, Jun 25, 2027

    Race in the Clouds - Alma Dirt Festival 2027

    Alma, CO

    Outside38.0 mi26.0 miMarathon22.0 mi

    Sat, Jul 10, 2027

    All-Out Dog Days

    Westminster, CO

    OutsideMarathon10K5K

    Sat, Jul 17, 2027

    Heatwave Half Marathon/5K/10K - Denver

    Denver, CO

    Outside50 m1 mile5K10K

    Sat, Jul 17, 2027

    Summer Splash Prairie Dog Half, 10k, & 5k

    Castle Rock, CO

    OutsideMarathon10K5K

    Sun, Jul 18, 2027

    Heatwave Half Marathon/5K/10K - Colorado Springs

    Colorado Springs, CO

    Outside50 m1 mile5K10K

    Sat, Jul 31, 2027

    Popsicle 5K/10K/Half - Colorado Springs

    Colorado Springs, CO

    Outside5K10KMarathon

    Sun, Aug 1, 2027

    Bound for Boston Marathon & Half Marathon - Denver

    Denver, CO

    OutsideMarathon

    Sat, Aug 7, 2027

    All-Out Runapalooza

    Arvada, CO

    OutsideMarathon10K5K

    Sun, Aug 15, 2027

    Erie Half & 5k

    Erie, CO

    OutsideMarathon5K

    Sat, Aug 21, 2027

    Byers Peak Stampede Half Marathon & 5K Run

    Fraser, CO

    OutsideMarathon3.0 mi

    Sun, Aug 22, 2027

    Pioneer Prairie Dog Half, 10k & 5k

    Westminster, CO

    OutsideMarathon10K5K

    Sat, Aug 28, 2027

    TBK Bank Thirsty 13 Half Marathon

    Durango, CO

    OutsideMarathon

    Mon, Sep 6, 2027

    Labor Day Half Marathon

    Parker, CO

    OutsideMarathon10K5K

    Sat, Sep 11, 2027

    Golden Harvest Half Marathon & 5K/10K - Denver

    Denver, CO

    Outside50 m1 mile5K10K

    Fri, Feb 10, 2034

    50 States Half Marathon Club General Membership

    Colorado Springs, CO

    OutsideMarathon

    Sat, Feb 11, 2034

    Fifty States Half Marathon Club Life Membership

    Colorado Springs, CO

    OutsideMarathon

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    Half Marathon races by city in Colorado

    Centennial32Colorado Springs15Arvada7Denver7Westminster5Fort Collins4Littleton3