Rankings · updated July 28, 2026

Best Races in Colorado

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

Best Marathons in Colorado

  1. 1 Bound for Boston Marathon & Half Marathon - Denver Denver, CO Aug 2026 15.0/100
  2. 2 Denver, CO Galloway Training Program Denver, CO Sep 2026 15.0/100
  3. 3 Colorado Springs Marathon, Half, 5K, and Kids K Colorado Springs, CO Oct 2026 15.0/100
  4. 4 Breckenridge RunFest Breckenridge, CO Oct 2026 15.0/100
  5. 5 Durango Marathon Durango, CO Oct 2026 15.0/100
  6. 6 Blue Sky Trail Marathon & Half Marathon Fort Collins, CO Oct 2026 15.0/100
  7. 7 22nd Annual Run Through Time Trail Marathon and Half Marathon Salida, CO Mar 2027 15.0/100
All US marathons rankings →

Best Half Marathons in Colorado

  1. 1 All-Out Runapalooza Arvada, CO Aug 2026 15.0/100
  2. 2 Byers Peak Stampede Half Marathon & 5K Run Fraser, CO Aug 2026 15.0/100
  3. 3 Black Squirrel Half Marathon Bellvue, CO Sep 2026 15.0/100
  4. 4 All-Out Fall Fest Westminster, CO Sep 2026 15.0/100
  5. 5 Autumn Run Buena Vista, CO Sep 2026 15.0/100
  6. 6 Beulah Challenge and OverIt Series - ON PAUSE DUE TO THE ASPEN ACRES FIRE Beulah, CO Sep 2026 15.0/100
  7. 7 All-Out Kooky-Spooky Golden, CO Nov 2026 15.0/100
  8. 8 All-Out Fa La La Westminster, CO Dec 2026 15.0/100
  9. 9 All-Out Polar Prowl Arvada, CO Jan 2027 15.0/100
  10. 10 All-Out Mardi Crawl Arvada, CO Feb 2027 15.0/100
All US half marathons rankings →

Best 10Ks in Colorado

  1. 1 Bolder Boulder 10K Boulder, CO May 2027 USATF 83.7/100
  2. 2 Eat. Run. Adopt. 10K Berthoud, CO Aug 2026 15.0/100
  3. 3 10k at 10,000 Feet Steamboat Springs, CO Sep 2026 15.0/100
  4. 4 14th Annual Superhero Event Greeley, CO Sep 2026 15.0/100
  5. 5 Broomfield Turkey Day 5K/10K Broomfield, CO Nov 2026 15.0/100
All US 10ks rankings →

Best 5Ks in Colorado

  1. 1 12th Annual Run for the Ring Aurora, CO Aug 2026 15.0/100
  2. 2 Eltuck Valley 5K - Lory Summer Trail Series Fort Collins, CO Aug 2026 15.0/100
  3. 3 5K at the Fair Durango, CO Aug 2026 15.0/100
  4. 4 Arapahoe Warrior 5K Centennial, CO Aug 2026 15.0/100
  5. 5 Bagel Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Aug 2026 15.0/100
  6. 6 CWCS 5K Color Fun Run Montrose, CO Aug 2026 15.0/100
  7. 7 Cancer League of Colorado Race 4 Research Denver, CO Aug 2026 15.0/100
  8. 8 2026 True Impact Ministries 5K/10K Centennial, CO Aug 2026 15.0/100
  9. 9 Coyote Chase 5k Louisville, CO Aug 2026 15.0/100
  10. 10 11th Annual Log Hill Hustle Ridgway, CO Aug 2026 15.0/100
All US 5ks rankings →

Every ranked race in Colorado

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 Leadville Trail 100 Leadville, CO Aug 2026 70.4/100
  3. 3 Quad Rock 50 Fort Collins, CO May 2027 54.2/100
  4. 4 Durango Brewer's Trail Series Durango, CO Jul 2026 15.0/100
  5. 5 12th Annual Run for the Ring Aurora, CO Aug 2026 15.0/100
  6. 6 2026 Rocky Mountain Strength Rendezvous Littleton, CO Aug 2026 15.0/100
  7. 7 Aug 1 - Social Ride @ location tbd Colorado Springs, CO Aug 2026 15.0/100
  8. 8 Boggy Draw Beat Down Dolores, CO Aug 2026 15.0/100
  9. 9 Bound for Boston Marathon & Half Marathon - Denver Denver, CO Aug 2026 15.0/100
  10. 10 Boulder Kids' Tri Camp Boulder, CO Aug 2026 15.0/100
  11. 11 Eltuck Valley 5K - Lory Summer Trail Series Fort Collins, CO Aug 2026 15.0/100
  12. 12 Aug 6 - Beginner & Advanced @ Stratton Colorado Springs, CO Aug 2026 15.0/100
  13. 13 Aug 6 - Intermediate @ Cheyenne Mountain State Park Colorado Springs, CO Aug 2026 15.0/100
  14. 14 BRR All-Comers Summer Track & Field Series #5 Boulder, CO Aug 2026 15.0/100
  15. 15 Eldorado Run for the Cure Eldorado Springs, CO Aug 2026 15.0/100
  16. 16 Choice City Running Festival Fort Collins, CO Aug 2026 15.0/100
  17. 17 5K at the Fair Durango, CO Aug 2026 15.0/100
  18. 18 All-Out Runapalooza Arvada, CO Aug 2026 15.0/100
  19. 19 Arapahoe Warrior 5K Centennial, CO Aug 2026 15.0/100
  20. 20 Dog Days of Summer Longmont, CO Aug 2026 15.0/100
  21. 21 Eat. Run. Adopt. 10K Berthoud, CO Aug 2026 15.0/100
  22. 22 Aug 13 - Beginners / Advanced @ Palmer Colorado Springs, CO Aug 2026 15.0/100
  23. 23 Aug 13 - Intermediate @ Red Rocks Colorado Springs, CO Aug 2026 15.0/100
  24. 24 2026 CKF Leadville Trail 100 MTB Leadville, CO Aug 2026 15.0/100
  25. 25 Bagel Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Aug 2026 15.0/100
  26. 26 CWCS 5K Color Fun Run Montrose, CO Aug 2026 15.0/100
  27. 27 Cancer League of Colorado Race 4 Research Denver, CO Aug 2026 15.0/100
  28. 28 Aug 20 - Advanced @ ABOS Colorado Springs, CO Aug 2026 15.0/100
  29. 29 Aug 20 - Beginners @ Pineries Colorado Springs, CO Aug 2026 15.0/100
  30. 30 Aug 20 - Intermediate @ Stratton Colorado Springs, CO Aug 2026 15.0/100
  31. 31 2026 True Impact Ministries 5K/10K Centennial, CO Aug 2026 15.0/100
  32. 32 Bark n' Bolt 1K with the Pints and Pups Dog Expo Arvada, CO Aug 2026 15.0/100
  33. 33 Byers Peak Stampede Half Marathon & 5K Run Fraser, CO Aug 2026 15.0/100
  34. 34 CEROX IRON + IRON X Frederick, CO Aug 2026 15.0/100
  35. 35 Coyote Chase 5k Louisville, CO Aug 2026 15.0/100
  36. 36 11th Annual Log Hill Hustle Ridgway, CO Aug 2026 15.0/100
  37. 37 Eltuck Valley 12K - Lory Summer Trail Series Bellvue, CO Aug 2026 15.0/100
  38. 38 Aug 27 - All groups @ Red Rocks (different meeting point for Adv) - 5:30 pm start! Colorado Springs, CO Aug 2026 15.0/100
  39. 39 Continental Divide Trail Run Steamboat Springs, CO Aug 2026 15.0/100
  40. 40 Bluffs Run 8K Lone Tree, CO Aug 2026 15.0/100
  41. 41 4th Annual Roost Rebellion Relays Denver, CO Sep 2026 15.0/100
  42. 42 Break Your Neck: Walk, Run, or Roll Pueblo, CO Sep 2026 15.0/100
  43. 43 Cirque Series - Arapahoe Basin, CO Keystone, CO Sep 2026 15.0/100
  44. 44 Demon Dash Arvada, CO Sep 2026 15.0/100
  45. 45 Denver, CO Galloway Training Program Denver, CO Sep 2026 15.0/100
  46. 46 10k at 10,000 Feet Steamboat Springs, CO Sep 2026 15.0/100
  47. 47 14th Annual Superhero Event Greeley, CO Sep 2026 15.0/100
  48. 48 2026 Lake Nighthorse Triathlon - Sprint and Olympic Durango, CO Sep 2026 15.0/100
  49. 49 53rd Annual Imogene Pass Run Telluride, CO Sep 2026 15.0/100
  50. 50 6 Dot Dash Littleton, CO Sep 2026 15.0/100
  51. 51 Black Squirrel Half Marathon Bellvue, CO Sep 2026 15.0/100
  52. 52 31st El Grito 5k (2026) Denver, CO Sep 2026 15.0/100
  53. 53 9/11 Heroes Run - Denver, Colorado Denver, CO Sep 2026 15.0/100
  54. 54 Buffalo Bicycle Classic Boulder, CO Sep 2026 15.0/100
  55. 55 Colorado Run for the Fallen Run/Walk/Ruck Palmer Lake, CO Sep 2026 15.0/100
  56. 56 2025 ColorFest Color Run/Walk 5K Pagosa Springs, CO Sep 2026 15.0/100
  57. 57 2026 Montbello Alive! 5K Denver, CO Sep 2026 15.0/100
  58. 58 All-Out Fall Fest Westminster, CO Sep 2026 15.0/100
  59. 59 Autumn Run Buena Vista, CO Sep 2026 15.0/100
  60. 60 Battle by the Brook Deckers, CO Sep 2026 15.0/100
  61. 61 Beulah Challenge and OverIt Series - ON PAUSE DUE TO THE ASPEN ACRES FIRE Beulah, CO Sep 2026 15.0/100
  62. 62 CEROX + IRON + IRON X Frederick, CO Sep 2026 15.0/100
  63. 63 Denver: Walk With Autism and Resource Fair Denver, CO Sep 2026 15.0/100
  64. 64 20th Annual Golden Gallop Golden, CO Sep 2026 15.0/100
  65. 65 Chile & Frijole Hot to Trot 5K & 10K Pueblo, CO Sep 2026 15.0/100
  66. 66 Connection 5k CARBONDALE, CO Sep 2026 15.0/100
  67. 67 CG Adventure Club - Elevation Everest Winter Park, CO Sep 2026 15.0/100
  68. 68 2026 Skate for Chicken Colorado Springs, CO Sep 2026 15.0/100
  69. 69 Boggy Draw Bear Chase Dolores, CO Sep 2026 15.0/100
  70. 70 2026 Suicide Prevention Color Walk/Run Center, CO Sep 2026 15.0/100
  71. 71 25th Annual Black Canyon Triathlon Montrose, CO Sep 2026 15.0/100
  72. 72 Denver Rotary Club Cycling to Serve 2026 Denver, CO Sep 2026 15.0/100
  73. 73 14er Fest 14K & 5K Buena Vista, CO Sep 2026 15.0/100
  74. 74 Colorado Coyotes Youth XC Invitational Cenennial, CO Sep 2026 15.0/100
  75. 75 Big Waves Family 5K run/walk Westminster, CO Oct 2026 15.0/100
  76. 76 Colorado Springs Marathon, Half, 5K, and Kids K Colorado Springs, CO Oct 2026 15.0/100
  77. 77 Emerald Mountain Trail Run Steamboat Springs, CO Oct 2026 15.0/100
  78. 78 Bagel Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Oct 2026 15.0/100
  79. 79 Breckenridge RunFest Breckenridge, CO Oct 2026 15.0/100
  80. 80 Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Oct 2026 15.0/100
  81. 81 Dialysis Dash 5K Grand Junction, CO Oct 2026 15.0/100
  82. 82 Durango Marathon Durango, CO Oct 2026 15.0/100
  83. 83 EDT XC Showdown Aurora, CO Oct 2026 15.0/100
  84. 84 Blue Sky Trail Marathon & Half Marathon Fort Collins, CO Oct 2026 15.0/100
  85. 85 Chili Chase Durango, CO Oct 2026 15.0/100
  86. 86 DU Crimson Classic 5K Run/1.5 Mile Walk Denver, CO Oct 2026 15.0/100
  87. 87 Apex Foundation Trick or Trot 5K & Halloween Hunt Powered by REP Fitness Arvada, CO Oct 2026 15.0/100
  88. 88 All-Out Kooky-Spooky Golden, CO Nov 2026 15.0/100
  89. 89 Alamosa Veterans Memorial Park Race Alamosa, CO Nov 2026 15.0/100
  90. 90 Bell Ringer 2 Miler Loveland, CO Nov 2026 15.0/100
  91. 91 City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research) Denver, CO Nov 2026 15.0/100
  92. 92 Colorado 24 Hour Run Fort Collins, CO Nov 2026 15.0/100
  93. 93 Canya Cañon Trail Race & Hike Colorado Springs, CO Nov 2026 15.0/100
  94. 94 Colorado Springs Veterans Day 5k Colorado Springs, CO Nov 2026 15.0/100
  95. 95 Colorado State Youth Cross Country Championships Aurora, CO Nov 2026 15.0/100
  96. 96 Denver Veterans Day Run Denver, CO Nov 2026 15.0/100
  97. 97 2026 Loveland Turkey Trot Loveland, CO Nov 2026 15.0/100
  98. 98 AdventHealth Avista Louisville Turkey Trot Louisville, CO Nov 2026 15.0/100
  99. 99 Alpine Bank Boulder Thanksgiving Day 5K Boulder, CO Nov 2026 15.0/100
  100. 100 Broomfield Turkey Day 5K/10K Broomfield, CO Nov 2026 15.0/100
  101. 101 Buena Vista Turkey Trot 5K & Family Fun Run Buena Vista, CO Nov 2026 15.0/100
  102. 102 Christmas Mountain 5 Mile Run Salida, CO Nov 2026 15.0/100
  103. 103 Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Nov 2026 15.0/100
  104. 104 2026 Summit for Life Aspen, CO Dec 2026 15.0/100
  105. 105 All-Out Fa La La Westminster, CO Dec 2026 15.0/100
  106. 106 Candy Cane Course - Colorado Springs Colorado Springs, CO Dec 2026 15.0/100
  107. 107 Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law Group Colorado Springs, CO Dec 2026 15.0/100
  108. 108 Candy Cane Course - Denver Westminster, CO Dec 2026 15.0/100
  109. 109 2026 Jingle Bell Run - Colorado Denver, CO Dec 2026 15.0/100
  110. 110 A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA Centennial, CO Dec 2026 15.0/100
  111. 111 All-Out Polar Prowl Arvada, CO Jan 2027 15.0/100
  112. 112 ALMAGEDDON Winter Triathlon presented by the Alma Foundation Alma, CO Jan 2027 15.0/100
  113. 113 Alley Loop Crested Butte, CO Jan 2027 15.0/100
  114. 114 Coffee Lover Run DENVER/AURORA Centennial, CO Jan 2027 15.0/100
  115. 115 All-Out Mardi Crawl Arvada, CO Feb 2027 15.0/100
  116. 116 22nd Annual Run Through Time Trail Marathon and Half Marathon Salida, CO Mar 2027 15.0/100
  117. 117 All-Out Spring Fever Golden, CO Mar 2027 15.0/100
  118. 118 Central Park 5k Denver, CO Mar 2027 15.0/100
  119. 119 Donut Dash Denver, CO Apr 2027 15.0/100
  120. 120 All-Out Beat the Heat Westminster, CO Apr 2027 15.0/100
  121. 121 Bigfoot Half Marathon Estes Park, CO Apr 2027 15.0/100
  122. 122 Coffee Lover Run DENVER/AURORA Centennial, CO Apr 2027 15.0/100
  123. 123 18 Hours of Fruita Loma, CO May 2027 15.0/100
  124. 124 Emerge 5K Boulder, CO May 2027 15.0/100
  125. 125 Colterris Wine Run 5k Palisade, CO May 2027 15.0/100
  126. 126 Colorado Women's Classic - Westminster Westminster, CO May 2027 15.0/100
  127. 127 Denver Mother's Day 5K Denver, CO May 2027 15.0/100
  128. 128 Colorado 13er (Half Marathon/10k/5k) Louisville, CO Jun 2027 15.0/100
  129. 129 All-Out Summer Breeze Arvada, CO Jun 2027 15.0/100
  130. 130 All-Out Dog Days Westminster, CO Jul 2027 15.0/100
  131. 131 Cookie Chase Denver, CO Jul 2027 15.0/100
  132. 132 50 States Half Marathon Club General Membership Colorado Springs, CO Feb 2034 15.0/100

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