RunningColorado
Running in Colorado
Browse upcoming amateur running events and compare dates, locations, and popularity. in Colorado.
Upcoming dates Colorado Community-rated events
Events listed
72
Sport
Running
Area
Colorado
Radius
350 km
This calendar in numbers
This calendar currently lists 72 upcoming events, from Sep 25, 2026 to Jul 8, 2027. October is the busiest month, with 30 events scheduled. Events are spread across 46 different locations; Denver hosts the most (7). Course distances range from 3.2 km to 50 km.
Browse all 72 events by date
September 2026
- Red Feather Trail Jamboree Sep 25
- 2026 Oktoberfest 5k Sep 26
- 2026 Platte Valley Companies Monument Marathon Sep 26
- 2026 Suicide Prevention Color Walk/Run Sep 26
- 24 Hours of Palmer Lake Sep 26
- Crested Butte Ultra Sep 26
- Estes Epic Ultra Run & MTB Race Sep 26
- Monument Marathon Sep 26
- Oktoberfest Run 5K/10K/13.1 - Denver/Aurora Sep 26
- Run for Beer - Prost Brewing Oktoberfest 5k Sep 26
- Runway 5K - Run for the Angels Sep 26
- Sangre de Cristo Ultras Sep 26
- Wild Wahatoya Runs Sep 26
- 14er Fest 14K & 5K Sep 27
- Boulderthon: Boulder Marathon Sep 27
- Sawatch Ascent 50k Sep 27
- Mainly Marathons Center of the Nation Series - Day 1 Sep 28
- 2026 Center of the Nation Series - Day 2 (CO) Sep 29
October 2026
- 2026 Breckenridge Road Marathon Oct 2
- Above the Clouds Ultra Oct 3
- Big Waves Family 5K run/walk Presented by Brumate Oct 3
- Colorado Springs Marathon, Half, 5K, and Kids K Oct 3
- Grand Valley Backyard Oct 3
- I Can 5K and Deja Vu 10K Oct 3
- Rut Run 5k Oct 3
- Sage Burner Trail Races Oct 3
- Spooky Sprint - Denver Oct 3
- The Bear Chase Trail Races Oct 3
- The Pretzel Run Oct 3
- SKECHERS Hot Chocolate Run Denver 2026 Oct 4
- Windsor Marathon, Half Marathon, 10k & 5k Oct 4
- Breckenridge Road Marathon Oct 10
- In Search of the GREAT PUMPKIN TIME TRIAL Oct 10
- Long View Marathon & Half Marathon Oct 10
- Rocky's Backyard Ultra Race Oct 10
- Durango Marathon Oct 11
- Bobcat Trail Race Oct 17
- Indian Creek Trail Runs Oct 17
- Spooky Sprint 5k Oct 17
- Denver Marathon 2026 Oct 18
- Bridge Burner Ultra Oct 24
- MonsterDASH Run - Denver Oct 24
- Race to Cure Sarcoma - Denver Oct 24
- Ghosts and Goblins 5K/10K Oct 25
- Colorado 24 Hour Run Oct 31
- Narrowleaf Lake Run Oct 31
- Panda Waddle 5k Oct 31
- Spooky Sprint - Colorado Springs Oct 31
November 2026
- Rim Rock Marathon & Half Marathon Nov 1
- Bell Ringer 2 Miler Nov 7
- Kessel Run Ultra Nov 7
- 2026 Southwest Series - Day 2 (CO) Nov 9
- Longmont Turkey Trot Nov 14
- Colorado Cold Rush Nov 21
- Feed Your Soul Turkey Trot 5K Nov 21
- Pumpkin Pie 5K/10K Nov 21
- TURKEY TREK (13.1, 10k, 5k & 2k) Nov 21
- Broomfield Turkey Day 5k Nov 26
- Mile High United Way Turkey Trot Nov 26
December 2026
- 2026 Moose March Dec 5
- 2026 Race of the Santas Dec 5
- ColderBOLDER 5K Dec 5
- Sawmill Trail Runs Dec 5
- A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA Dec 26
January 2027
February 2027
April 2027
June 2027
- Labor Day Half Marathon Jun 9
July 2027
- Dog Days of Summer Jul 8
- Eat. Run. Adopt. 10K Jul 8
- RoC & Roll 5K: Run, Walk, or Wheel Jul 8