Colorado Half Marathons
126 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 126 upcoming half marathons over the next 12 months. September is the busiest month for them, with 27. Most are around Centennial, Colorado Springs, Denver. The next one is Denver, CO Galloway Training Program on September 5 in Denver.
- Sep 202627 races
- Oct 202615 races
- Nov 202614 races
- Dec 20267 races
- Jan 202710 races
- Feb 20278 races
- Mar 202711 races
- Apr 202710 races
- May 20276 races
- Jun 20276 races
- Jul 20276 races
- Aug 20276 races
September 2026
- Sat 9/5Denver, CO Galloway Training ProgramDenver, CO · Marathon · Half Marathon · from $91 · register ↗
- Sat 9/5Golden Harvest Half Marathon & 5k/10k - DenverWestminster, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Sun 9/6Golden Harvest Half Marathon & 5k/10k - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · register ↗
- Mon 9/7Labor Day Half MarathonParker, CO · Half Marathon · 10K · 5K · from $27 · register ↗
- Sat 9/12Black Squirrel Half MarathonBellvue, CO · Half Marathon · from $90 · register ↗
- Sat 9/12Devil on the DivideEmpire, CO · 50K · 22K · register ↗
- Sat 9/12NEDNED Trail FestNederland, CO · Half Marathon · 10K · 5K · Trail · register ↗
- Sat 9/12National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 9/12Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 9/12Snow Mountain RanchGranby, CO · 50K · 33K · Half Marathon · 10K · 5K · Trail · register ↗
- Sat 9/12Trail Sisters Women's Half Marathon & 10kBuena Vista, CO · Half Marathon · 10K · Trail · from $55 · register ↗
- Sun 9/13Colorado Mountain Half+ Series 2026Littleton, CO · Half Marathon · Trail · register ↗
- Sun 9/13NUN RUNCentennial, CO · Half Marathon · 5K · 1 Mile · register ↗
- Sun 9/13RMRR Fall Marathon Training Series #2Thornton, CO · 20K · 30K · from $20 · register ↗
- Sat 9/19All-Out Fall FestWestminster, CO · Half Marathon · 10K · 5K · from $20 · register ↗
- Sat 9/19Autumn RunBuena Vista, CO · Half Marathon · 10K · 5K · 1K · from $30 · register ↗
- Sat 9/19Pikes Peak AscentManitou Springs, CO · 13.3 Miles · from $88 · register ↗
- Sat 9/19The Sunlight ShowdownGlenwood Springs, CO · 5K · 10K · Half Marathon · from $35 · register ↗
- Sun 9/2020th Annual Golden GallopGolden, CO · 5K · 10K · 20K · from $25 · register ↗
- Sun 9/20Fall EquinoxFort Collins, CO · Half Marathon · 5 Miles · from $50 · register ↗
- Fri 9/25Red Feather Trail JamboreeRed Feather Lakes, CO · 50 Mile · 50K · Half Marathon · 94 Miles · Trail · from $90 · register ↗
- Sat 9/26Deep Creek Trail Half MarathonTelluride, CO · Half Marathon · Trail · register ↗
- Sat 9/26Oktoberfest Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 9/26Run for Donuts 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 9/26WILD Wahatoya RunsLa Veta, CO · 50K · Half Marathon · 8 Miles · register ↗
- Sun 9/27Girls on the Run Rockies Boulderthon SoleMates 2026Boulder, CO · Marathon · Half Marathon · 10K · from $25 · register ↗
- Sun 9/27Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - ColoradoBoulder, CO · Half Marathon · 5K · 10K · from $40 · register ↗
October 2026
- Sat 10/3Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs, CO · Marathon · Half Marathon · 5K · 1K · from $8 · register ↗
- Sat 10/3Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half MarathonCanon City, CO · 5K · 8 Miles · Half Marathon · 10K · Trail · from $40 · register ↗
- Sat 10/3Spooky Sprint - DenverLittleton, CO · 1 Mile · 5K · 10K · Half Marathon · from $20 · register ↗
- Sun 10/4Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile RunWindsor, CO · Marathon · Half Marathon · 10K · 5K · 1 Mile · from $20 · register ↗
- Sat 10/10Breckenridge RunFestBreckenridge, CO · Marathon · Half Marathon · 10K · 5K · 1 Mile · from $25 · register ↗
- Sat 10/10Coffee Lovers Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 10/10Cookie Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 10/10The Long View MarathonFort Collins, CO · Marathon · Half Marathon · 5K · from $35 · register ↗
- Sun 10/11Durango MarathonDurango, CO · Marathon · Half Marathon · from $20 · register ↗
- Sun 10/11Westy Half & 5kWestminster, CO · Half Marathon · 5K · from $30 · register ↗
- Sat 10/17Blue Sky Trail Marathon & Half MarathonFort Collins, CO · 26.7 Miles · 13.8 Miles · Trail · from $90 · register ↗
- Sat 10/24Mancos Cowboy Half Marathon, 5K, and Fun RunMancos, CO · Half Marathon · 5K · 1 Mile · from $25 · register ↗
- Sat 10/31Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 10/31PB&J Fuel Run 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · 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 11/7HRCA Backcountry Wilderness Half MarathonLone Tree, CO · Half Marathon · Trail · from $65 · 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 11/14Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 11/14Lone Tree Reckoning Half and 5KLoveland, CO · Half Marathon · 5K · from $45 · register ↗
- Sat 11/14Louisville Trail RaceLouisville, CO · Half Marathon · 10K · 5K · Trail · 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 1/16Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial, CO · 5K · 10K · Half Marathon · 1 Mile · from $30 · register ↗
- Sat 1/16ALMAGEDDON Winter Triathlon presented by the Alma FoundationAlma, CO · 20K · from $40 · 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 · registration closed · 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 ↗
- Sat 1/30Time Travel Half-Marathon/5K/10K - DenverDenver, CO · 1 Mile · 5K · 10K · Half Marathon · from $15 · register ↗
- Sun 1/31Time Travel Half-Marathon/5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $15 · 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 · registration closed · 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 · registration closed · 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 · 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 for Bagels 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 4/18Horsetooth 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 $45 · 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 5/2The 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 ↗
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 · registration closed · 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 ↗
- 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 ↗
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 · registration closed · register ↗
- Sat 7/17Summer Splash Prairie Dog Half, 10k, & 5kCastle Rock, CO · Half Marathon · 10K · 5K · from $25 · register ↗
- Sun 7/18Heatwave Half Marathon/5K/10K - Colorado SpringsColorado Springs, CO · 1 Mile · 5K · 10K · Half Marathon · from $17 · registration closed · 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 $25 · 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 $30 · register ↗
- Sat 8/21Byers Peak Stampede Half Marathon & 5K RunFraser, CO · Half Marathon · 5K · from $45 · register ↗
- Sat 8/28TBK Bank Thirsty 13 Half MarathonDurango, CO · Half Marathon · from $89 · registration closed · register ↗
Planning a race
- Choosing a first marathonmoving up from the half, and picking a debut race
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