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
132
Sport
Running
Area
Colorado
Radius
350 km
This calendar in numbers
This calendar currently lists 132 upcoming events, from Aug 15, 2026 to Jul 8, 2027. September is the busiest month, with 53 events scheduled. Events are spread across 78 different locations; Denver hosts the most (15). Course distances range from 3.2 km to 50 km.
Browse all 132 events by date
August 2026
- Farish Mt Bike Race Aug 15
- Frontier Academy Community 5K Aug 15
- Med Bow Rail Marathon & Half Marathon Aug 15
- Miles for Migraine Colorado Aug 15
- Mt. Sneffels Half Marathon, 10K & Kids Fun Run Aug 15
- Run for PB& J DENVER/AURORA Aug 15
- Run for PB&J 5K/10K/13.1 - Denver/Aurora Aug 15
- Sunrise Stampede Aug 15
- Sunrise Stampede Aug 15
- 2026 Life Time Leadville 10K presented by La Sportiva Aug 16
- Erie Half & 5k Aug 16
- Race For Research 5K Run/Walk Aug 16
- Telluride Mountain Run Aug 21
- Boulder 5K Taco Run Aug 22
- Byers Peak Stampede Half Marathon & 5K Run Aug 22
- Impact Uganda 5k/10k Aug 22
- Leadville Trail 100 Run Aug 22
- Continental Divide Trail Run Aug 23
- Pioneer Prairie Dog Half Marathon 10k & 5k Aug 23
- Rock Hawk Trail Races Aug 29
- Run Like the Wind 5k / 2k / Dog Jog Aug 29
- Sloth Run 5K/10K/13.1 - Denver/Aurora Aug 29
- Sloth Run DENVER/AURORA Aug 29
- TBK Bank Thirsty 13 Half Marathon Aug 29
- Wine Run 5k at The Winery at Holy Cross Abbey Aug 30
September 2026
- Golden Harvest Half Marathon, 5k & 10k - Denver Sep 5
- Broncos 7K Sep 6
- Golden Harvest Half Marathon, 5k & 10k - Colorado Springs Sep 6
- Labor Day Half Marathon, 10K and 5K Sep 7
- 2026 Master of the Mountains Adventure Relay Sep 11
- Flaming Foliage Relay Sep 11
- 2026 RiNo 5K + Larimer Mile Sep 12
- Black Squirrel Half Marathon Sep 12
- Devil on the Divide Sep 12
- National Chocolate Day Run for Chocolates 5K/10K/13.1 - Denver/Aurora Sep 12
- National Chocolate Day Run for Chocolates DENVER/AURORA Sep 12
- RiNo 5K Sep 12
- Snow Mountain Ranch Trail Running Festival Sep 12
- Snow Mtn Ranch Trail Festival Sep 12
- The Denver 5k Sep 12
- LEAD KING LOOP 25K, 8M, Kids Run Sep 13
- Nun Run Sep 13
- NUN RUN Sep 13
- Tiger Prowl 5K Sep 13
- Cars Open Lapping FRIDAY Sep 18 Sep 18
- Run Rabbit Run Sep 18
- Severance Glow 5K Run or Walk Sep 18
- Battle by the Brook Sep 19
- Beulah Challenge Sep 19
- Cheyenne Schools Foundation - Run for 1 Sep 19
- Denver: Walk With Autism and Resource Fair Sep 19
- Marine Memorial 5K Sep 19
- Miles 4 Madison Sep 19
- Run for Beer - Waldschänke Ciders 5k Sep 19
- Wellington STAR Foundation 5K 10K Sep 19
- 2026 Pikes Peak Marathon Sep 20
- Fall Equinox Marathon, Half Marathon & 5 Mile Sep 20
- The Golden Gallop Sep 20
- Wheat Ridge Farmers 5000 Sep 20
- 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
- West Line Winder 50k 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
- Mile High United Way Turkey Trot 2026 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
July 2027
- Dog Days of Summer Jul 8
- Eat. Run. Adopt. 10K Jul 8
- RoC & Roll 5K: Run, Walk, or Wheel Jul 8