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
203
Sport
Running
Area
Colorado
Radius
350 km
This calendar in numbers
This calendar currently lists 203 upcoming events, from Jul 1, 2026 to Apr 7, 2027. July is the busiest month, with 56 events scheduled. Events are spread across 94 different locations; Denver hosts the most (23). Course distances range from 3.2 km to 100 km.
Browse all 203 events by date
July 2026
- Denver Rotary Club Cycling to Serve 2026 Jul 1
- RV/Carports for SCCA July 2/3/4/5 Jul 2
- 38th Annual Gut Buster 5K Color Run Jul 3
- 16th Annual Telluride Foundation Rundola: Run for Good Jul 4
- 2026 Independence Day 10k Jul 4
- 2026 Niwot Mile Jul 4
- 40th Annual Boogie's Buddy Race, Presented By Aspen Valley Health Jul 4
- 4th of July Donut Hole Mile Jul 4
- 6th Annual July 4th ROCK-IT RUN Jul 4
- Avery Brewing Co. 4K on the 4th Jul 4
- Burro Buster 5k Jul 4
- Cheyenne Firecracker 5K/10K Jul 4
- Devil's Thumb Freedom Run 5k/15k Jul 4
- Freedom Run 5k Jul 4
- July 4th Run 5K/10K/13.1 - Denver/Aurora Jul 4
- July 4th Run DENVER/AURORA Jul 4
- Leadville Firecracker 5K Jul 4
- Let Freedom Run 5k - Longmont Jul 4
- Let Freedom Run 5k - Louisville Jul 4
- Loveland Liberty 5K Jul 4
- 2026 Hardrock Hundred Mile Endurance Run Jul 10
- Hardrock 100 Endurance Run Jul 10
- The Silverheels Trail Runs Jul 10
- All-Out Beat the Heat Jul 11
- Cookie Chase Jul 11
- Heatwave Half Marathon - Denver Jul 11
- Silver Rush 50 Jul 11
- Will Run for Cannoli 5K Jul 11
- Diplo's Run Club 5K - Denver Jul 12
- Heatwave Half Marathon - Colorado Springs Jul 12
- High Lonesome 100 Jul 17
- Logger Day 5K Fun Run Jul 17
- Ouray 100 and 50 Mile Endurance Run Jul 17
- 2026 OCA Colorado 5K Panda Run Jul 18
- 49th Annual Manassa Pioneer Days 5K Run Jul 18
- Kristy's Kindness 5K Jul 18
- Respect Life 5K Jul 18
- Silverton Alpine Runs Jul 18
- Summer Splash Prairie Dog Half Marathon, 10k & 5k Jul 18
- The Blazing Brick 5K Jul 18
- Donor Dash 5K Run/Walk Jul 19
- Floyd Hill Dash Jul 19
- i-70 Floyd Hill Dash Jul 19
- 14er Challenge Jul 23
- Never Summer 100K & 60K Jul 24
- 2nd Annual Pancreatic Cancer Awareness in Honor of Diana Cantu - 5K Fun Run/Walk Jul 25
- Aspen Valley Marathon Jul 25
- Elevation Run/Walk Jul 25
- Pikes Peak Ultra Jul 25
- Run for Coffee Lovers 5K/10K/13.1 - Denver/Aurora Jul 25
- Run for Coffee Lovers DENVER/AURORA Jul 25
- San Juan Gravel Classic Jul 25
- Spirit of the West 5k Run/Walk Jul 26
- Stations of the Cross 10k Jul 26
- 2026 STRS #4 - Tom's Baby Jul 29
- Wild West Relay Jul 31
August 2026
- 12th Annual Run for the Ring Aug 1
- 2026 SKECHERS Wicked Wine Run Denver Aug 1
- Aspen Backcountry Aug 1
- Popsicle 5K/10K/Half - Colorado Springs Aug 1
- Run for the Ring Aug 1
- Sheep Mountain Ultras Aug 1
- Bound for Boston Marathon & Half Marathon - Denver Aug 2
- Eldorado Springs Run for the Cure Aug 6
- Arapahoe Warrior 5K Aug 8
- Dirt Circus - Boulder Aug 8
- Georgetown to Idaho Springs Half Marathon Aug 8
- Georgetown to Idaho Springs Half Marathon 2026 Aug 8
- Stonewall Century Ride 2026 Aug 8
- Summer Sizzler - Denver Aug 8
- Pancake Stampede 5K Aug 9
- Summer Sizzler - Colorado Springs Aug 9
- The Bullfrog Summer Surge Aug 9
- 2026 STRS #5 - Carter Park Scurry Aug 12
- 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