5K races in Colorado
251 upcoming 5K races in Colorado, with dates and field depth before you enter.
October 2026
- Sat, Oct 31Boos & Brews Halloween 5K @ Number Thirty EightDenver5K
- Sat, Oct 31Cedar Mesa Peach Loop Halloween 5KCedaredge5K
- Sat, Oct 31EAPL Zombie Run 5KEvergreen5K
- Sat, Oct 31Eerie ErieErie5K10K
- Sat, Oct 31Halloween Zombie Fun Run 5K & 1mileIdaho Springs5K
- Sat, Oct 31Panda Waddle 5KGrand Junction5K
- Sat, Oct 31Spooky SprintColorado Springs5K10K
- Sat, Oct 31Woodmen Hills Monstaer Mash 5k and Beer mileColorado Springs5K
- Sat, Oct 31Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Oct 31PB&J Fuel Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Oct 31Spooky Sprint - Colorado SpringsColorado Springs5K10KHalf marathon
- Sat, Oct 31Halloween 5K Fundraiser!Grand Junction5K
- Sat, Oct 31Halloween Fun 5kSteamboat Springs5K Competitive
- Sat, Oct 31I Ain't Scared (of 5k)Thornton5K
- Sat, Oct 31Colleen De Reuck XC ClassicBoulder5K Very competitive
- Sat, Oct 31Woodmen Hills Monster Mash 5k and Beer RunPeyton5K
- Sat, Oct 31Zombie Fun Run 5k & 1mileIdaho Springs5K
November 2026
- Sun, Nov 1Día de los Muertos 5K @ Cheluna BrewingAurora5K
- Sun, Nov 1Fossil Creek Park T&H 5KFort Collins5K
- Sun, Nov 1Girls on the Run 5KFort Collins5K
- Sun, Nov 1RMRR Trophy Series - NovemberDenver5K
- Sun, Nov 1RMRR November 5k/15kDenver5K
- Sun, Nov 1Feet for Justice RunDenver5K10K
- Sun, Nov 1All-Out Kooky-SpookyGolden5K10KHalf marathon
- Sun, Nov 1Girls on the Run Northern Colorado Fall 5KFort Collins5K
- Sat, Nov 7Bear RunColorado Springs5K
- Sat, Nov 7Girls on the Run 5K - Steamboat SpringsSteamboat Springs5K
- Sat, Nov 7Liberty-2-Liberty 5KFort Collins5K
- Sat, Nov 7Sole Mates 5KLongmont5K
- Sat, Nov 7Turkey Trails- DenverLittleton5K10KHalf marathon Local
- Sat, Nov 7City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)Denver5K10K Competitive
- Sat, Nov 712th edition Sole Mates 5k & Brew Fest presented by Shoes & Brews and Left Hand BrewingLongmont5K Very competitive
- Sat, Nov 7Excel Eagle Trot 5K/1K Family Fun RunArvada5K
- Sat, Nov 7Alamosa Veterans Memorial Park RaceAlamosa5K10K
- Sat, Nov 7Break a Leg 5kGrand Junction5K Local
- Sun, Nov 8Girls on the Run 5KColorado Springs5K
- Sun, Nov 8The Great Candy RunDenver5K Local
- Sun, Nov 8Turkey TrailsColorado Springs5K10K
- Sun, Nov 8Veteran's Day 5K @ Goat Patch BrewingColorado Springs5K
- Sun, Nov 8Turkey Trails - Colorado SpringsColorado Springs5K10KHalf marathon
- Sun, Nov 8Colorado Springs Veterans Day 5kColorado Springs5K
- Sun, Nov 8Dragon Dash 5K Run/WalkDenver5K
- Mon, Nov 9Southwest Series - Day 2 - CODurango5K
- Sat, Nov 14Lone Tree Reckoning Half and 5KLoveland5K
- Sat, Nov 14Louisville Trail RaceLouisville5K10K
- Sat, Nov 14Mustache fun run/walkGrand Junction5K
- Sat, Nov 14Run for Mental Health 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Nov 14Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Nov 14Salute to Veterans 5K/10K/Half Marathon - DenverAurora5K10KHalf marathon
- Sat, Nov 14Denver Veterans Day RunDenver5K10K Local
- Sat, Nov 14Leyden Rock Turkey Trot 5KArvada5K Competitive
- Sat, Nov 14Grand Valley Brew RunsGrand Junction5K
- Sun, Nov 15Girls on the Run 5KDenver5K
- Sun, Nov 15Girls on the Run Denver Metro 5KDenver5K
- Sun, Nov 15Salute to Veterans 5K/10K/Half Marathon - Colorado SpringsColorado Springs5K10KHalf marathon
- Sat, Nov 21Bailey Turkey TrotBailey5K
- Sat, Nov 21Feed Your Soul Fund Turkey Trot 5KWheat Ridge5K Local
- Sat, Nov 21Turkey Trot 5K - BrightonBrighton5K Local
- Sat, Nov 21Turkey-Donut Predict RunFort Collins5K
- Sat, Nov 21TURKEY TREK (13.1, 10k, 5k & 2k)Arvada5K10KHalf marathon
- Sat, Nov 21Pumpkin Pie 5K/10KDenver5K10K Local
- Sat, Nov 21Turkey TrotCenter5K
- Sat, Nov 21Turkey Trot PredictColorado Springs5K
- Sat, Nov 21285 Turkey Trot - 2026Bailey5K10K
- Thu, Nov 26Buena Vista Turkey Trot 5K & Family Fun RunBuena Vista5K
- Thu, Nov 26Fitness Avenue Turkey Trot 5KJohnstown5K
- Thu, Nov 26GJ Turkey TrotGrand Junction5K
- Thu, Nov 26Highlands Ranch Turkey Day 5KHighlands Ranch5K
- Thu, Nov 26Louisville Turkey TrotLouisville5K
- Thu, Nov 26Pagosa Turkey Trot 5KPagosa Springs5K
- Thu, Nov 26Parker Parks and Recreation Turkey Day 5KParker5K
- Thu, Nov 26Turkey Day 5KFrisco5K
- Thu, Nov 26Turkey ROCK TrotCastle Rock5K Local
- Thu, Nov 26Turkey Trot Fun Run - 5KAlamosa5K
- Thu, Nov 26YMCA of the Rockies Turkey Trot 5KEstes Park5K
- Thu, Nov 26Westcliffe Turkey TrotWestcliffe5K
- Thu, Nov 262026 Loveland Turkey TrotLoveland5K Local
- Thu, Nov 26Gobble Wobble Run 2026Littleton5K
- Thu, Nov 26The Great Turkey ChaseGolden5K
- Thu, Nov 26TurCreek Trot 5KGreenwood Village5K Competitive
- Thu, Nov 26Harvesting Hope 5kDenver5K
- Thu, Nov 26AdventHealth Avista Louisville Turkey TrotLouisville5K
- Thu, Nov 26Broomfield Turkey Day 5K/10KBroomfield5K10K Local
- Thu, Nov 26Glenwood Springs Turkey Day 5K & Fun RunGlenwood Springs5K
- Thu, Nov 26NCMC Turkey TrotGreeley5K Local
- Thu, Nov 26Pelican Lakes Turkey TrotWindsor5K Local
- Thu, Nov 26YMCA of Pueblo Turkey TrotPueblo5K
- Thu, Nov 26YMCA Turkey Trot 5K presented by Corwin HondaColorado Springs5K Local
- Thu, Nov 26Alpine Bank Boulder Thanksgiving Day 5KBoulder5K Very competitive
- Thu, Nov 26Grand Junction Fire Fighters Foundation GJ Turkey TrotGrand Junction5K Local
- Thu, Nov 26Steamboat Springs Turkey TrotSteamboat Springs5K Local
- Thu, Nov 26Winter Park Turkey Trot 5KWinter Park5K
- Fri, Nov 27Tardy Turkey TrotEstes Park5K
- Sat, Nov 28City of Aurora Turkey TrotAurora5K
- Sat, Nov 28Coffee Lovers Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Nov 28Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sun, Nov 29Tiger Trail 5K Run/WalkColorado Springs5K
December 2026
- Sat, Dec 5Candy Cane CourseColorado Springs5K10K
- Sat, Dec 5Chasing Santa 5KColorado Springs5K
- Sat, Dec 5ColderBOLDERBoulder5K Competitive
- Sat, Dec 5Four Corners Quad KeyahFour Corners Monument5K
- Sat, Dec 5Jingle Jog 5KEagle5K
- Sat, Dec 5Ugly Sweater 5K @ Left Hand BrewingLongmont5K
- Sat, Dec 5Candy Cane Course - Colorado SpringsColorado Springs5K10K
- Sat, Dec 5Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law GroupColorado Springs5K10K
- Sat, Dec 5Toy DropLoveland5K10K Local
- Sat, Dec 5All-Out Fa La LaWestminster5K10KHalf marathon Local
- Sat, Dec 5Run with the Buffalo Fun Run: 5K DistanceCommerce City5K
- Sun, Dec 6Rudolph Ramble 5KDenver5K Competitive
- Sun, Dec 6Rock Canyon Half Marathon- 40th Anniversary Run!Pueblo5KMarathon
- Sun, Dec 6Candy Cane Course - DenverWestminster5K10K
- Sat, Dec 12Ugly Sweater fun run/walkFruita5K
- Sat, Dec 12Run for Breast Cancer 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Dec 12Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Dec 12Santa Shuffle 5KLittleton5K
- Sat, Dec 12Santa Catch 5k & 10kWindsor5K10K Competitive
- Sat, Dec 12Superior Stocking RunSuperior5K
- Sat, Dec 12WinterFest 5k & Fun RunThornton5K Competitive
- Sat, Dec 12Grand Valley Brew RunsGrand Junction5K
- Sat, Dec 12YMCA Jingle Jog 5K presented by Corwin HondaFountain5K
- Sun, Dec 13Jingle Bell Run - DenverDenver5K
- Sun, Dec 132026 Jingle Bell Run - ColoradoDenver5K
- Sat, Dec 19Santa's Dash for CashDenver5K
- Sat, Dec 19Santa's Dash for Ca$hDenver5K Very competitive
- Sat, Dec 19Sweaty Sweater 5kFort Collins5K Local
- Sun, Dec 20Ugly Sweater 5KDenver5K Local
- Sat, Dec 26A Merry Christmas Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Dec 26New Year's Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Thu, Dec 31Resolution Run 5KFort Collins5K
- Thu, Dec 31Resolution Run - Fort CollinsFort Collins5K Very competitive
January 2027
- Fri, Jan 1Rescue RunColorado Springs5K10K
- Fri, Jan 1Resolute Runner 5kArvada5K Competitive
- Fri, Jan 1Salida New Year's Day 5KSalida5K
- Sat, Jan 2YMCA of Pueblo Hot Chocolate 5KPueblo5K
- Sat, Jan 9Sentinel FlurryGolden5K Very competitive
- Sat, Jan 9All-Out Polar ProwlArvada5K10KHalf marathon Local
- Sat, Jan 9Winter Series - The Coolest Race in Town!Colorado Springs5K10K
- Sat, Jan 16MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Jan 16Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sun, Jan 17Colorado Cold Rush 5K/10KLouisville5K10K
- Sun, Jan 17Colorado Cold SnapLouisville5K10K Local
- Sat, Jan 23Polar 5K & Polar Bear PlungeFort Collins5K
- Sat, Jan 23Chilly Willy 5K/10K/Half Marathon - Colorado SpringsColorado Springs5K10KHalf marathon
- Sun, Jan 24Freakin Freezin 5K - DenverDenver5K
- Sun, Jan 24Yeti Chase 5k/10kMorrison5K10K
- Sat, Jan 30Rio Frio 5K on IceAlamosa5K
- Sat, Jan 30Coffee Lovers Run DENVER/AURORACentennial5K10KHalf marathon
- Sat, Jan 30Run for Donut DENVER/AURORACentennial5K10KHalf marathon
- Sat, Jan 30Time Travel Half-Marathon/5K/10K - DenverWestminster5K10KHalf marathon Local
- Sat, Jan 30Rio Frio 5kAlamosa5K Local
- Sun, Jan 31Time Travel Half-Marathon/5K/10K - Colorado SpringsColorado Springs5K10KHalf marathon
February 2027
- Sat, Feb 6Westy Winter Waggle 5&10kWestminster5K10K Local
- Sat, Feb 6All-Out Mardi CrawlArvada5K10KHalf marathon
- Sun, Feb 7Old Man Winter Bike Rally & RunLyons5K10KHalf marathon Competitive
- Sat, Feb 13Run for Chocolate 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Feb 13Valentine's Day Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Feb 13Heart Throb 5kArvada5K Local
- Sun, Feb 14Ralston Creek Half Marathon & 5kArvada5KHalf marathon
- Sun, Feb 14The Toyota Super Half Marathon™& Game Day 5K™Colorado Springs5KHalf marathon
- Sat, Feb 27Run For Mental Health DENVER/AURORACentennial5K10KHalf marathon
- Sat, Feb 27Run Together Against Breast Cancer DENVER/AURORACentennial5K10KHalf marathon
- Sun, Feb 28Highlands Ranch 5kHighlands Ranch5K
March 2027
- Sat, Mar 6Time to Paddy 5K/10K & Lucky 13.1 13.1 - DenverDenver5K10KHalf marathon
- Sat, Mar 6Sharin' O' The Green 5kFort Collins5K Competitive
- Sun, Mar 7That Dam RunCherry Creek State Park5K10K
- Sun, Mar 7Time to Paddy 5K/10K and Lucky 13.1Colorado Springs5K10K
- Sun, Mar 7Time to Paddy 5K/10K & Lucky 13.1 - Colorado SpringsColorado Springs5K10KHalf marathon
- Sat, Mar 13Grand Valley Brew RunsGrand Junction5K
- Sun, Mar 14Lucky Brew Race 5K, 10K, 15k & Half MarathonSeverance5K10KHalf marathon
- Sat, Mar 20St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Mar 20Sunrise Marathon 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sun, Mar 21Central Park 5kDenver5K Very competitive
- Sun, Mar 21All-Out Spring FeverGolden5K10KHalf marathon Local
- Sun, Mar 21Spring EquinoxWellington5KHalf marathon Local
- Sat, Mar 27Always Hope Easter Run DENVER/AURORACentennial5K10KHalf marathon
- Sat, Mar 27SuperHeroes Run DENVER/AURORACentennial5K10KHalf marathon
April 2027
- Sat, Apr 3Aspen parkrunAspen5K
- Sat, Apr 3Grand Valley Oncology - Life In Color 5KGrand Junction5K
- Sun, Apr 4Donut DashDenver5K Local
- Sat, Apr 10Mountain Ridge Trail RaceHighlands Ranch5K10K
- Sat, Apr 10Run for PB&J 5k/10k/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Apr 10Sloth Run 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sun, Apr 11Platte River Half-Marathon, Relay & 5kLittleton5KHalf marathon Local
- Sun, Apr 11Spring Fling Prairie Dog Half, 10k, & 5kArvada5K10KHalf marathon Local
- Sat, Apr 17South Boulder Creek parkrunBoulder5K
- Sun, Apr 18Elevate Kids Fun RunGrand Junction5K10K
- Sat, Apr 24Coffee Lovers Run DENVER/AURORACentennial5K10KHalf marathon
- Sat, Apr 24Run for Donut DENVER/AURORACentennial5K10KHalf marathon
- Sat, Apr 24DoNot Stop Half Marathon/5K/10K - Colorado SpringsColorado Springs5K10KHalf marathon
- Sat, Apr 24All-Out Beat the HeatWestminster5K10KHalf marathon Competitive
- Sat, Apr 24Bigfoot Half MarathonEstes Park5KHalf marathon
- Sun, Apr 25DoNot Stop Half Marathon/5K/10K - DenverDenver5K10KHalf marathon
- Sun, Apr 25Unicorn 5k (Denver-East)Denver5K Local
May 2027
- Sun, May 2The Colorado MarathonFort Collins5K10KHalf marathonMarathon Local
- Sun, May 2Longmont Half & 5k (LM Half)Longmont5KHalf marathon Competitive
- Sat, May 8Hometown Half Marathon/5K/10K - Colorado SpringsColorado Springs5K10KHalf marathon Local
- Sat, May 8Run for Chocolate 5k/10k/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, May 8Colterris Wine Run 5kPalisade5K
- Sun, May 9Hometown Half Marathon/5K/10K - DenverDenver5K10KHalf marathon Local
- Sun, May 9Colorado Women's Classic - WestminsterWestminster5K10K
- Sun, May 9Denver Mother's Day 5KDenver5K Local
- Sat, May 22Run the Spruce 5K and 1K Fun RunPalmer Lake5K
- Sat, May 29SuperHeroes Run DENVER/AURORACentennial5K10KHalf marathon
June 2027
- Sun, Jun 6Colorado 13er (Half Marathon/10k/5k)Louisville5K10KHalf marathon Local
- Sun, Jun 6Flamingo Day 5KDenver5K Local
- Sat, Jun 12All-Out Summer BreezeArvada5K10KHalf marathon Local
- Sat, Jun 12Alpha 5K ChallengeBoulder5K
- Sat, Jun 125k Race : Summer Sizzle : early birdFort Lupton5K
- Sat, Jun 19Run Juneteenth Day 5K/10K/13.1 DENVER/AURORACentennial5K10KHalf marathon
- Sat, Jun 19Treat Trot - DenverDenver5K10K
- Sat, Jun 19Unicorn 5k (North)Thornton5K
- Sat, Jun 19Red, White and Brew 5k, 10k & Half MarathonWindsor5K10KHalf marathon Local
- Sun, Jun 20Treat Trot Colorado SpringsColorado Springs5K10K
- Sun, Jun 20Father's Day Classic 10k, 5k, & 1 MileArvada5K10K Competitive
July 2027
- Sat, Jul 3Red, White, and WARRIOR 5KGrand Junction5K Competitive
- Sun, Jul 4Greeley Freedom 5k Walk & RunGreeley5K Competitive
- Sun, Jul 4Let Freedom Run 5k/10k - LouisvilleLouisville5K10K Competitive
- Sun, Jul 4Independence Day Freedom 5KBuena Vista5K
- Sat, Jul 10All-Out Dog DaysWestminster5K10KHalf marathon Local
- Sat, Jul 10Cookie ChaseDenver5K Competitive
- Sat, Jul 17Heatwave Half Marathon/5K/10K - DenverDenver5K10KHalf marathon Local
- Sat, Jul 17Summer Splash Prairie Dog Half, 10k, & 5kCastle Rock5K10KHalf marathon Local
- Sun, Jul 18Heatwave Half Marathon/5K/10K - Colorado SpringsColorado Springs5K10KHalf marathon Local
- Sun, Jul 25Spirit of the West 5K Run/WalkGolden5K Competitive
- Sat, Jul 31Popsicle 5K/10K/Half - Colorado SpringsColorado Springs5K10KHalf marathon Local
August 2027
- Sat, Aug 7Summer Sizzler- DenverDenver5K10K Local
- Sat, Aug 7All-Out RunapaloozaArvada5K10KHalf marathon Local
- Sat, Aug 7RoC & Roll 5K: Run, Walk, or WheelFountain5K
- Sat, Aug 7Unicorn 5k (South)Highlands Ranch5K
- Sun, Aug 8Summer Sizzler- Colorado SpringsColorado Springs5K10K Local
- Sun, Aug 15Erie Half & 5kErie5KHalf marathon Local
- Mon, Aug 16James Test SiteLyons5K
- Sat, Aug 21Ram Run 5KDenver5K Competitive
- Sat, Aug 21Byers Peak Stampede Half Marathon & 5K RunFraser5KHalf marathon Local
- Sun, Aug 22Pioneer Prairie Dog Half, 10k & 5kWestminster5K10KHalf marathon Local
September 2027
- Mon, Sep 6Labor Day Half MarathonParker5K10KHalf marathon Local
- Sat, Sep 11Golden Harvest Half Marathon & 5K/10K - DenverDenver5K10KHalf marathon Local
- Sat, Sep 112027 Suicide Prevention Color Walk/RunCenter5K
- Sat, Sep 11Spirit of the Valley 5kGrand Junction5K Very competitive
- Sat, Sep 11The Denver 5kDenver5K Competitive
- Sun, Sep 12Golden Harvest Half Marathon & 5K/10K - Colorado SpringsColorado Springs5K10KHalf marathon
- Sat, Sep 18All-Out Fall FestWestminster5K10KHalf marathon
- Sat, Sep 18Autumn RunBuena Vista5K10KHalf marathon
October 2027
- Sat, Oct 2Colorado Springs Marathon, Half, 5K, and Kids KColorado Springs5KHalf marathonMarathon Local
- Sat, Oct 2Not So Flatt Breast Cancer Awareness Run/Walk – 5K & 10K in Denver, COWestminster5K10K
- Sat, Oct 2Spooky Sprint - DenverDenver5K10KHalf marathon Local
- Sat, Oct 2The Extra Mile 5KEnglewood5K
- Sat, Oct 9Manitou 5KManitou Springs5K Competitive
- Sun, Oct 10Westy Half & 5kWestminster5KHalf marathon Local
- Sat, Oct 16Running Scared 5K/13K - DenverLittleton5K Local
- Sun, Oct 17Running Scared 5K/13K - Colorado SpringsColorado Springs5K Local