Colorado Half Marathons
104 upcoming half marathons across Colorado, updated nightly. Want radius search and maps? Open these in the Race Finder.
When to race: half marathons in Colorado
Colorado has 104 upcoming half marathons over the next 12 months. Among complete calendar months, April 2027 has the most listed races, with 13. Most are around Centennial, Colorado Springs, Denver. The next one is Mancos Cowboy Half Marathon, 5K, and Fun Run on October 24 in Mancos.
- Oct 20266 races
- Nov 202612 races
- Dec 20267 races
- Jan 20278 races
- Feb 20279 races
- Mar 202711 races
- Apr 202713 races
- May 20279 races
- Jun 20278 races
- Jul 20276 races
- Aug 20277 races
- Sep 20275 races
- Oct 20273 races
October 2026
- Sat 10/24Mancos Cowboy Half Marathon, 5K, and Fun RunMancos, CO · Half Marathon · 5K · 1 Mile · from $25 · register ↗
- Sat 10/24McGraw Memorial Park "Quick Draw @ McGraw" 2.1 & 12.6 Mile Trail RacesBailey, CO · 2 Mile · 12.6 Miles · Trail · from $25 · register ↗
- Sat 10/31HRCA Backcountry Wilderness Half MarathonLone Tree, CO · Half Marathon · Trail · from $65 · register ↗
- Sat 10/31Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · registration closed · register ↗
- Sat 10/31PB&J Fuel Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · registration closed · register ↗
- Sat 10/31Spooky Sprint - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
November 2026
- Sun 11/1All-Out Kooky-SpookyGolden, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 11/7Turkey Trails- DenverLittleton, CO · 1 Mile · 5K · 10K · Half Marathon · Trail · from $17 · register ↗
- Sun 11/8Turkey Trails - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · Trail · from $17 · register ↗
- Sat 11/14Louisville Trail RaceLouisville, CO · Half Marathon · 10K · 5K · Trail · register ↗
- Sat 11/14Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 11/14Salute to Veterans 5K/10K/Half Marathon - DenverAurora, CO · 5K · 10K · Half Marathon · from $15 · register ↗
- Sat 11/14Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sun 11/15Salute to Veterans 5K/10K/Half Marathon - Colorado SpringsColorado Springs, CO · 5K · 10K · Half Marathon · from $15 · register ↗
- Sat 11/21Colorado Cold Rush UltraColorado Springs, CO · 50K · Half Marathon · 10K · register ↗
- Sat 11/21TURKEY TREK (13.1, 10k, 5k & 2k)Arvada, CO · Half Marathon · 10K · 5K · 2K · from $26 · register ↗
- Sat 11/28Coffee Lovers Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 11/28Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
December 2026
- Sat 12/5All-Out Fa La LaWestminster, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sun 12/6Rock Canyon Half Marathon- 40th Anniversary Run!Pueblo, CO · Half Marathon · 5K · from $35 · register ↗
- Sun 12/6RunDenver Series 2026-27Denver, CO · 5K · 10K · Half Marathon · register ↗
- Sat 12/12Run for Breast Cancer 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 12/12Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 12/26A Merry Christmas Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 12/26New Year's Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
January 2027
- Sat 1/9All-Out Polar ProwlArvada, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 1/9Winter Series - The Coolest Race in Town!Colorado Springs, CO · 10K · 8 Miles · 10 Mile · 20K · 5K · from $40 · register ↗
- Sat 1/16Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 1/16MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 1/23Chilly Willy 5K/10K/Half Marathon - Colorado SpringsColorado Springs, CO · 5K · 10K · Half Marathon · 13.1K · from $25 · register ↗
- Sat 1/30Alley LoopCrested Butte, CO · Marathon · Half Marathon · 10K · 5K · 3K · from $25 · register ↗
- Sat 1/30Coffee Lover Run DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 1/30Run for Donut DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
February 2027
- Sat 2/6All-Out Mardi CrawlArvada, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 2/6Stories Trail RunsColorado Springs, CO · 6.7 Miles · Half Marathon · 19.6 Miles · Trail · from $60 · register ↗
- Sun 2/7Old Man Winter Bike Rally & RunLyons, CO · 23 Miles · 40 Miles · 75K · 5K · 10K · from $49 · register ↗
- Sat 2/13Run for Chocolate 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 2/13Valentine's Day Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sun 2/14Ralston Creek Half Marathon & 5kArvada, CO · Half Marathon · 5K · from $25 · register ↗
- Sun 2/14The Toyota Super Half Marathon™& Game Day 5K™Colorado Springs, CO · Half Marathon · 5K · from $35 · register ↗
- Sat 2/27Run For Mental Health DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 2/27Run Together Against Breast Cancer DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
March 2027
- Sat 3/6Time to Paddy 5K/10K & Lucky 13.1 13.1 - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sun 3/7That Dam Run 13.1, 10K, 5KArapahoe County, CO · 5K · 10K · Half Marathon · register ↗
- Sun 3/7Time to Paddy 5K/10K & Lucky 13.1 - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sat 3/1322nd Annual Run Through Time Trail Marathon and Half MarathonSalida, CO · Marathon · Half Marathon · 2 Mile · Trail · from $15 · registration closed · register ↗
- Sun 3/14Lucky Brew Race 5K, 10K, 15k & Half MarathonSeverance, CO · 5K · 10K · 15K · 0.6 Miles · Half Marathon · from $15 · register ↗
- Sat 3/20Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 3/20St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sun 3/21All-Out Spring FeverGolden, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sun 3/21Spring EquinoxWellington, CO · Half Marathon · 5K · from $25 · register ↗
- Sat 3/27Always Hope Easter Run DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 3/27SuperHeroes Run DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
April 2027
- Sun 4/4Three Creeks Half MarathonEnglewood, CO · Half Marathon · from $65 · register ↗
- Sat 4/10Run Through The Decades 6K/7K/8K/Half - Colorado SpringsColorado Springs, CO · 6K · 7K · 8K · Half Marathon · from $35 · registration closed · register ↗
- Sat 4/10Run for PB&J 5k/10k/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 4/10Sloth Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sun 4/11Platte River Half-Marathon, Relay & 5kLittleton, CO · Half Marathon · 5K · from $40 · register ↗
- Sun 4/11Spring Fling Prairie Dog Half, 10k, & 5kArvada, CO · Half Marathon · 10K · 5K · from $39 · register ↗
- Sun 4/18Horsetooth Half Marathon - Presented by Fort Collins ConnexionFort Collins, CO · Half Marathon · from $75 · register ↗
- Sat 4/24Coffee Lover Run DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 4/24Run for Donut DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 4/24All-Out Beat the HeatWestminster, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 4/24Bigfoot Half MarathonEstes Park, CO · Half Marathon · 5K · from $30 · register ↗
- Sat 4/24DoNot Stop Half Marathon/5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sun 4/25DoNot Stop Half Marathon/5K/10K - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
May 2027
- Sun 5/2Longmont Half & 5k (LM Half)Longmont, CO · Half Marathon · 5K · from $39 · register ↗
- Sun 5/2The Colorado MarathonFort Collins, CO · Marathon · Half Marathon · 10K · 5K · from $40 · register ↗
- Sat 5/8Hometown Half Marathon/5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sat 5/8Run for Chocolate 5k/10k/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 5/8Valkyrie Trail RaceColorado Springs, CO · 50K · Marathon · 30K · Half Marathon · 8 Miles · Trail · register ↗
- Sun 5/9Hometown Half Marathon/5K/10K - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sun 5/162027 Denver Colfax MarathonDENVER, CO · Marathon · 5K · Half Marathon · 10 Mile · register ↗
- Sat 5/22Farish Trail RaceWoodland Park, CO · Half Marathon · 10K · 5K · 1 Mile · Trail · from $50 · register ↗
- Sat 5/29SuperHeroes Run DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
June 2027
- Sun 6/6Colorado 13er (Half Marathon/10k/5k)Louisville, CO · Half Marathon · 10K · 5K · from $30 · register ↗
- Sun 6/6The Steamboat MarathonSteamboat Springs, CO · Marathon · Half Marathon · 10K · 0.5 Miles · from $65 · register ↗
- Sat 6/12All-Out Summer BreezeArvada, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 6/19Red, White and Brew 5k, 10k & Half MarathonWindsor, CO · 5K · 10K · Half Marathon · 1 Mile · from $18 · register ↗
- Sat 6/19Run Juneteenth Day 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sun 6/20Estes Park Marathon & Half Marathon 2027Estes Park, CO · 7 Miles · 5 Miles · Marathon · Half Marathon · register ↗
- Fri 6/25Race in the Clouds - Alma Dirt Festival 2027Alma, CO · 38 Miles · Marathon · Half Marathon · 22 Miles · 10K · from $10 · register ↗
- Sat 6/26Slacker Half Marathon-Relay-4-Mile RacesGeorgetown, CO · Half Marathon · 4 Miles · from $35 · registration closed · register ↗
July 2027
- Sat 7/10All-Out Dog DaysWestminster, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 7/17Heatwave Half Marathon/5K/10K - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sat 7/17Summer Splash Prairie Dog Half, 10k, & 5kCastle Rock, CO · Half Marathon · 10K · 5K · from $39 · register ↗
- Sun 7/18Heatwave Half Marathon/5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sat 7/24Pikes Peak UltraColorado Springs, CO · 50 Mile · 50K · 30K · 20K · register ↗
- Sat 7/31Popsicle 5K/10K/Half - Colorado SpringsColorado Springs, CO · 5K · 10K · Half Marathon · from $25 · registration closed · register ↗
August 2027
- Sun 8/1Bound for Boston Marathon & Half Marathon - DenverDenver, CO · Marathon · Half Marathon · from $26 · registration closed · register ↗
- Sat 8/7All-Out RunapaloozaArvada, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 8/7Winter Park Trail RunsWinter Park, CO · 50K · Half Marathon · 10K · Trail · register ↗
- Sun 8/15Erie Half & 5kErie, CO · Half Marathon · 5K · from $39 · register ↗
- Sat 8/21Byers Peak Stampede Half Marathon & 5K RunFraser, CO · Half Marathon · 5K · from $45 · register ↗
- Sun 8/22Pioneer Prairie Dog Half, 10k & 5kWestminster, CO · Half Marathon · 10K · 5K · from $39 · register ↗
- Sat 8/28TBK Bank Thirsty 13 Half MarathonDurango, CO · Half Marathon · from $89 · registration closed · register ↗
September 2027
- Mon 9/6Labor Day Half MarathonParker, CO · Half Marathon · 10K · 5K · from $27 · register ↗
- Sat 9/11Golden Harvest Half Marathon & 5K/10K - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sun 9/12Golden Harvest Half Marathon & 5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sat 9/18All-Out Fall FestWestminster, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 9/18Autumn RunBuena Vista, CO · Half Marathon · 10K · 5K · from $30 · registration closed · register ↗
October 2027
- Sat 10/2Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs, CO · Marathon · Half Marathon · 5K · 1K · from $8 · register ↗
- Sat 10/2Spooky Sprint - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $20 · register ↗
- Sun 10/10Westy Half & 5kWestminster, CO · Half Marathon · 5K · from $39 · registration closed · register ↗
Planning a race
- Choosing a first marathonmoving up from the half, and picking a debut race
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