Trail RunningColorado
Trail Running in Colorado
Browse upcoming amateur trail running events and compare dates, locations, and popularity. in Colorado.
Upcoming dates Colorado Community-rated events
Events listed
168
Sport
Trail Running
Area
Colorado
Radius
350 km
This calendar in numbers
This calendar currently lists 168 upcoming events, from Jul 2, 2026 to Jun 26, 2027. August is the busiest month, with 49 events scheduled. Events are spread across 103 different locations; Colorado Springs hosts the most (9). Course distances range from 3.2 km to 161 km.
Browse all 168 events by date
July 2026
- Durango Brewer's Trail Series Jul 2
- Durango Main Avenue Mile Jul 4
- July 4th ROCK-IT RUN 5k, Half Marathon & Relay Jul 4
- Palmer Lake July 4 Fun Run Jul 4
- Red Feather Lakes 3.6 Mile Fun Run Jul 4
- Vail HillClimb Jul 5
- Vermejo Park Flyathlon Jul 9
- Hardrock Hundred Endurance Run Jul 10
- DRMABPsi 1–5K Walk, Run & Roll Jul 11
- Life Time Silver Rush 50 Run presented by La Sportiva 2026 Jul 11
- RMRR July 2mi & pancake breakfast Jul 12
- Ouray 100 Mile Endurance Run Jul 17
- Ouray 100 Mile Endurance Run Jul 17
- 10K and 5K at 10,000 Feet Jul 18
- 5K & 10K @ 10,000 Feet Jul 18
- Festival in the Clouds Firefighter 5K, Fun Run and Doggie Dash Jul 18
- Hardrock 100 Mile 2026 Jul 18
- Powderhorn Mountain Trail Climb 5k & 15k Jul 18
- Ranch Camp Roundup 5k, 10k Trail Run Jul 18
- Silverton Alpine Marathon Jul 18
- Spring Creek Memorial Trail Run Jul 18
- Thumbs Up Summer Slam Jul 18
- TransRockies Run Charity Bibs Jul 18
- Barr Trail Mountain Race Jul 19
- Barr Trail Mountain Race Jul 19
- Kendall Mountain Run Jul 19
- Kendall Mountain Run Jul 19
- TransRockies Run - Pass to Pub Jul 19
- TransRockies Run – Pass To Pub Jul 19
- Flyin' Ryan Memorial 5k Jul 24
- Never Summer 100k & 60k Jul 24
- Never Summer Dirty Double Jul 24
- Beas Knees Citizens' Race and National High School Trail Championships Jul 25
- Box Canyon Trail Races Jul 25
- Creede 100 Jul 25
- Enchanted Forest Jul 25
- Grand Mesa Ultras Jul 25
- Staunton 10 Mile Trail Race - 7/25/26 Jul 25
- World Championship Pack Burro Race Jul 26
- Summit 200 Jul 27
- The Summit 200 Jul 27
- HRCA Badlands Circuit Jul 29
- 11th Annual Middle Creek Flyathlon Jul 31
- Rocky Mountain Half Marathon and 5K Jul 31
- Wild West Relay Jul 31
August 2026
- 2026 Rocky Mountain Strength Rendezvous Aug 1
- Aspen Backcountry Marathon Aug 1
- Berry Picker Trail Run Aug 1
- Flying Colors 5K Fun Run/Walk Aug 1
- Kennebec Mountain Run Aug 1
- Philmont Trail Race Aug 1
- Rocky Mountain Half Marathon 2026 Aug 1
- The Unicorn 5k (South) Aug 1
- Two Brothers Up-and-Down Aug 1
- Vail Berry Picker Trail Run Aug 1
- Winter Park 50K Aug 1
- Eltuck Valley 5K – Lory Summer Trail Series Aug 4
- Lory Summer Trail Series Aug 4
- All-Out Runapalooza Aug 8
- Dirt Circus – Denver Aug 8
- Pat's Pony Express Aug 8
- Reece’s Roundup Trail Run Aug 8
- Ute 100 Mile & 50 Mile Aug 8
- Into the Hills 10K – Lory Summer Trail Series Aug 11
- San Juan Softie 100 Aug 14
- Boulder Rez Marathon Aug 15
- Enlightenment Mountain Run Aug 15
- Leadville Trail 100 Mile 2026 Aug 15
- Med Bow Rail Marathon and Half Marathon Aug 15
- Med Bow Rail Marathon and Half Marathon Aug 15
- MOCO Trails Wild West Backyard Ultra Aug 15
- Roxborough Ultras Aug 15
- The Cheyenne Mountain Run Aug 15
- The Cheyenne Mountain Run Aug 15
- Westminster Night Trail Aug 15
- Westminster Trail Race Aug 15
- Leadville 10K Aug 16
- Pikes Peak Marathon 2026 Aug 16
- Into the Hills 5K - Lory Summer Trail Series Aug 18
- Antelope Dash Aug 22
- Arrowhead Half Marathon & 5K Aug 22
- Byers Peak Stampede Aug 22
- Staunton Rocks! Marathon & Half Aug 22
- Staunton Rocks! Trail Marathon & Half Aug 22
- Telluride Mountain Run Aug 22
- Rebel Run 5k Aug 23
- Eltuck Valley 12K – Lory Summer Trail Series Aug 25
- Boulder Sunset Run Aug 29
- Continental Divide Trail Run Aug 29
- Ouray 50 Mile Endurance Run Aug 29
- Rock Hawk Aug 29
- Rock Hawk Trail Race Aug 29
- Rocky Mountain Run 5K Aug 29
- Wine Run 5k at The Winery at Holy Cross Abbey Aug 30
September 2026
- Front Range Ultra Dayze Sep 3
- Front Range Ultra Dayze Sep 3
- Mighty Marmot Kids Trail Race #1 Sep 4
- Cirque Series - Arapahoe Basin Sep 5
- Creede Mountain Run Sep 5
- Grand Traverse Mountain Run Sep 5
- 10k @ 10,000 Feet Sep 6
- 10k at 10,000 Feet Sep 6
- 53rd Annual Imogene Pass Run Sep 12
- American Heroes Run Sep 12
- Black Squirrel Half Sep 12
- Black Squirrel Half Marathon Sep 12
- Break Your Neck: Walk, Run, or Roll Sep 12
- Imogene Pass Run Sep 12
- MeadowGold 11K & 5K Sep 12
- Meadowgold 5K and 11K Trail Run Sep 12
- Ned Ned Half Marathon Sep 12
- Ned Ned Trail Fest Sep 12
- NedNed Trail Fest Sep 12
- Pikes Peak Challenge Sep 12
- Snow Mountain Ranch Trail Festival Sep 12
- Trail Sisters Women's Trail Half Marathon Sep 12
- Colorado Mountain Half+ Series 2026 Sep 13
- Ouray 50 Miler Sep 13
- Lake Fork Flyathlon Sep 18
- Mighty Marmot Kids Trail Race #2 Sep 18
- 2026 Pikes Peak Ascent Sep 19
- All-Out Fallfest Sep 19
- Autumn Run Sep 19
- Autumn Run Sep 19
- Break of Dawn North Table Trail Race Sep 19
- Break of Dawn Trail Run Sep 19
- Ouray Mountain Trail Run Sep 19
- Expo Park XC Sep 20
- Red Feather Trail Jamboree – 3 Day Challenge Sep 25
- Red Feather Trail Jamboree – 50Mile Sep 25
- Colorado Brain Tumor Walk & Race Sep 26
- Cougar Ridge Classic Sep 26
- Cougar Ridge Classic 26K Trail Run Sep 26
- Deep Creek Trail Half Marathon Sep 26
- OUTLAST COLORADO SPRINGS Sep 26
- So Long to Summer 5K/10K Sep 26
- West Line Winder Sep 26
- Red Feather Trail Jamboree - 50k Sep 27
- Red Feather Trail Jamboree – Half Marathon Sep 27
October 2026
- Mighty Marmot Kids Trail Race #3 Oct 2
- Cart to Cart Trail Run Oct 3
- Emerald Mountain Trail Run Oct 3
- OUTLAST DENVER Oct 3
- Rim to Rim Royal Gorge Race Oct 3
- Sage Burner Trail Race Oct 3
- Sage Burner Trail Race Oct 3
- The Bear Chase Oct 3
- The Bear Chase 100K, 50M & 50K Oct 3
- West Elk Challenge Trail Marathon Oct 3
- Pikes Peak Road Runners Fall Series I Oct 4
- The Bear Chase Half Marathon & 10K Oct 4
- Boulder XC Series – Meet 1 Oct 10
- Suffer Better Fall Trail Run Oct 10
- Westy Half & 5k Oct 11
- Blue Sky Marathon Oct 17
- Blue Sky Trail Marathon Oct 17
- Bobcat Trail Races Oct 17
- Blue Sky Half Marathon Oct 18
- Colorado 24 Hour Run Oct 31
November 2026
- Louisville Trail Race Nov 14
- Louisville Trail Race Nov 14
- Colorado Cold Rush Ultra Nov 21
February 2027
March 2027
April 2027
May 2027
- Colorado Marathon May 2
June 2027
- Rueter-Hess Trail Run Jun 26