Rankings · updated October 30, 2026

Best Races in Colorado

Ranked by composite score from public signals — no pay-to-play, ever. How scoring works →

Composite /100 · FLD field · HST history · CRD credentials · CHR character

  1. 1 Bolder Boulder 10K Boulder, CO May 2027 USATF 83.7/100
  2. 2 Quad Rock 50 Fort Collins, CO May 2027 49.1/100
  3. 3 Central Park 5k Denver, CO Mar 2027 USATF 48.1/100
  4. 4 Colorado 24 Hour Run Fort Collins, CO Nov 2026 USATF 43.3/100
  5. 5 Bound for Boston Marathon & Half Marathon - Denver Denver, CO Aug 2027 USATF 39.1/100

Longest-running in Colorado

1 races we can date but haven't measured enough of to score. Oldest first. What we measure →

  1. 1 22nd Annual Run Through Time Trail Marathon and Half Marathon Salida, CO Mar 2027 2006 20 years running

Also listed, not yet ranked

74 races we list but haven't measured enough of to score. By date. What we measure →

  1. All-Out Kooky-Spooky Golden, CO Nov 2026 Not yet rankedno verified data
  2. Fall Series - Get Dirty! Get Muddy! Colorado Springs, CO Nov 2026 Not yet rankedno verified data
  3. 12th edition Sole Mates 5k & Brew Fest presented by Shoes & Brews and Left Hand Brewing Longmont, CO Nov 2026 Not yet rankedno verified data
  4. Alamosa Veterans Memorial Park Race Alamosa, CO Nov 2026 Not yet rankedno verified data
  5. Bell Ringer 2 Miler Loveland, CO Nov 2026 Not yet rankedno verified data
  6. Break a Leg 5k Grand Junction, CO Nov 2026 Not yet rankedno verified data
  7. City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research) Denver, CO Nov 2026 Not yet rankedno verified data
  8. Excel Eagle Trot 5K/1K Family Fun Run Arvada, CO Nov 2026 Not yet rankedno verified data
  9. Nielson Challenge Colorado Springs, CO Nov 2026 Not yet rankedno verified data
  10. Canya Cañon Trail Race & Hike Colorado Springs, CO Nov 2026 Not yet rankedno verified data
  11. Colorado State Youth Cross Country Championships Aurora, CO Nov 2026 Not yet rankedno verified data
  12. Denver Veterans Day Run Denver, CO Nov 2026 Not yet rankedno verified data
  13. Grand Valley Brew Runs Grand Junction, CO Nov 2026 Not yet rankedno verified data
  14. Chase the Glow Estes Park, CO Nov 2026 Not yet rankedno verified data
  15. 2026 Loveland Turkey Trot Loveland, CO Nov 2026 Not yet rankedno verified data
  16. AdventHealth Avista Louisville Turkey Trot Louisville, CO Nov 2026 Not yet rankedno verified data
  17. Alpine Bank Boulder Thanksgiving Day 5K Boulder, CO Nov 2026 Not yet rankedno verified data
  18. Broomfield Turkey Day 5K/10K Broomfield, CO Nov 2026 Not yet rankedno verified data
  19. Buena Vista Turkey Trot 5K & Family Fun Run Buena Vista, CO Nov 2026 Not yet rankedno verified data
  20. Durango Turkey Trot presented by Animas Surgical Hospital Durango, CO Nov 2026 Not yet rankedno verified data
  21. Christmas Mountain 5 Mile Run Salida, CO Nov 2026 Not yet rankedno verified data
  22. Coffee Lovers Run 5K/10K/13.1 Denver/Aurora Centennial, CO Nov 2026 Not yet rankedno verified data
  23. 2026 Summit for Life Aspen, CO Dec 2026 Not yet rankedno verified data
  24. All-Out Fa La La Westminster, CO Dec 2026 Not yet rankedno verified data
  25. Candy Cane Course - Colorado Springs Colorado Springs, CO Dec 2026 Not yet rankedno verified data
  26. Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law Group Colorado Springs, CO Dec 2026 Not yet rankedno verified data
  27. Candy Cane Course - Denver Westminster, CO Dec 2026 Not yet rankedno verified data
  28. 2026 Jingle Bell Run - Colorado Denver, CO Dec 2026 Not yet rankedno verified data
  29. A Merry Christmas Run 5K/10K/13.1 Denver/Aurora Centennial, CO Dec 2026 Not yet rankedno verified data
  30. All-Out Polar Prowl Arvada, CO Jan 2027 Not yet rankedno verified data
  31. ALMAGEDDON Winter Triathlon presented by the Alma Foundation Alma, CO Jan 2027 Not yet rankedno verified data
  32. Colorado Cold Snap Louisville, CO Jan 2027 Not yet rankedno verified data
  33. Chilly Willy 5K/10K/Half Marathon - Colorado Springs Colorado Springs, CO Jan 2027 Not yet rankedno verified data
  34. Alley Loop Crested Butte, CO Jan 2027 Not yet rankedno verified data
  35. Coffee Lovers Run Denver/Aurora Centennial, CO Jan 2027 Not yet rankedno verified data
  36. All-Out Mardi Crawl Arvada, CO Feb 2027 Not yet rankedno verified data
  37. Chilly Cheeks Duathlon Englewood, CO Feb 2027 Not yet rankedno verified data
  38. Team CKF Running Series Aspen, CO Mar 2027 Not yet rankedno verified data
  39. Erin Go Bragh 7.77k Westminster, CO Mar 2027 Not yet rankedno verified data
  40. All-Out Spring Fever Golden, CO Mar 2027 Not yet rankedno verified data
  41. Always Hope Easter Run Denver/Aurora Centennial, CO Mar 2027 Not yet rankedno verified data
  42. Donut Dash Denver, CO Apr 2027 Not yet rankedno verified data
  43. All-Out Beat the Heat Westminster, CO Apr 2027 Not yet rankedno verified data
  44. Bigfoot Half Marathon Estes Park, CO Apr 2027 Not yet rankedno verified data
  45. Coffee Lovers Run Denver/Aurora Centennial, CO Apr 2027 Not yet rankedno verified data
  46. DoNot Stop Half Marathon/5K/10K - Colorado Springs Colorado Springs, CO Apr 2027 Not yet rankedno verified data
  47. DoNot Stop Half Marathon/5K/10K - Denver Denver, CO Apr 2027 Not yet rankedno verified data
  48. 18 Hours of Fruita Loma, CO May 2027 Not yet rankedno verified data
  49. Emerge 5K Boulder, CO May 2027 Not yet rankedno verified data
  50. Colterris Wine Run 5k Palisade, CO May 2027 Not yet rankedno verified data
  51. Colorado Women's Classic - Westminster Westminster, CO May 2027 Not yet rankedno verified data
  52. Denver Mother's Day 5K Denver, CO May 2027 Not yet rankedno verified data
  53. Endure Trail Runs Divide, CO May 2027 Not yet rankedno verified data
  54. Colorado 13er (Half Marathon/10k/5k) Louisville, CO Jun 2027 Not yet rankedno verified data
  55. All-Out Summer Breeze Arvada, CO Jun 2027 Not yet rankedno verified data
  56. Alpha 5K Challenge Boulder, CO Jun 2027 Not yet rankedno verified data
  57. All-Out Dog Days Westminster, CO Jul 2027 Not yet rankedno verified data
  58. Cookie Chase Denver, CO Jul 2027 Not yet rankedno verified data
  59. Eat. Run. Adopt. 10K Berthoud, CO Jul 2027 Not yet rankedno verified data
  60. All-Out Runapalooza Arvada, CO Aug 2027 Not yet rankedno verified data
  61. Dog Days of Summer Longmont, CO Aug 2027 Not yet rankedno verified data
  62. Evergreen Mountain Weeknight Race Evergreen, CO Aug 2027 Not yet rankedno verified data
  63. Erie Half & 5k Erie, CO Aug 2027 Not yet rankedno verified data
  64. Byers Peak Stampede Half Marathon & 5K Run Fraser, CO Aug 2027 Not yet rankedno verified data
  65. 2027 Suicide Prevention Color Walk/Run Center, CO Sep 2027 Not yet rankedno verified data
  66. 2027 Lake Nighthorse Triathlon - Sprint and Olympic Durango, CO Sep 2027 Not yet rankedno verified data
  67. Break Your Neck: Walk, Run, or Roll Pueblo, CO Sep 2027 Not yet rankedno verified data
  68. All-Out Fall Fest Westminster, CO Sep 2027 Not yet rankedno verified data
  69. Autumn Run Buena Vista, CO Sep 2027 Not yet rankedno verified data
  70. Sangre de Cristo Trail Festival Westcliffe, CO Sep 2027 Not yet rankedno verified data
  71. Colorado Springs Marathon, Half, 5K, and Kids K Colorado Springs, CO Oct 2027 USATF Not yet rankedno verified data
  72. Spooky Sprint - Denver Denver, CO Oct 2027 Not yet rankedno verified data
  73. Chili Chase Durango, CO Oct 2027 Not yet rankedno verified data
  74. Colorado Springs Veterans Day 5k Colorado Springs, CO Nov 2027 Not yet rankedno verified data