Trail Runs in Colorado — 2026

There are 39 trail runs in Colorado scheduled for 2026. The next is the Sunset Trail Running Festival in Boulder on June 21. Colorado trail runs run primarily June.

Sunset Trail Running Festival

Sun, Jun 21 · Boulder, CO Boulder

Kids 1K5K12K +1

From $15 Open Closing Soon

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Race in the Clouds - Alma Dirt Festival 2026

Thu, Jun 25 · Alma, CO Alma

Highschool/Middle School Short Course (6.1miles)Trail 10KHighschool/Middle School Long Course (13 miles) +8

From $0 Open Closing Soon 10 spots left

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The Sunlight Showdown

Sat, Jun 27 · Glenwood Springs, CO Glenwood Springs

5k Trail Run10k Trail Run1/2 Marathon Trail Run

From $35 Open Closing Soon

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Durango Brewer's Trail Series

Thu, Jul 2 · Durango, CO Durango

High Trestle Finale - Benefiting The HiveAnarchy Brewing - Benefiting ...Ska Brewing - Benefiting the La Plata County Humane Society +1

From $30 Open

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Silverheels Trail Runs

Fri, Jul 10 · Como, CO Como

10-Mile19-Mile60k +3

From $50 Open

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TransRockies Run Charity Bibs

Sat, Jul 18 · Buena Vista, CO Buena Vista

Individual Fundraiser Charity Bib

From $0 Open Closing Soon 3 spots left

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Audi Power of Four Trail Run

Sat, Jul 18 · Aspen, CO Aspen

10K Run25K Run50K Run

From $105 Open Closing Soon 75 spots left

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Beas Knees Citizens' Race and National High School Trail Championships

Sat, Jul 25 · Salida, CO Salida

Girls' National ChampionshipBoys' National ChampionshipBeas Knees Citizens' Race

From $25 Open

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Sheep Mountain Trail Runs

Sat, Aug 1 · Fairplay, CO Fairplay

Half Marathon50k50-Mile

From $70 Open

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Kennebec Mountain Run

Sat, Aug 1 · Hesperus, CO Hesperus

15 Mile

From $75 Open Closing Soon

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Pat's Pony Express

Sat, Aug 8 · Colorado Springs, CO Colorado Springs

Pat's Pony Express - 8 MilePat's Pony Express - 16 Mile

From $65 Closed 75 spots left

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Pat's Pony Express

Sat, Aug 8 · Woodland Park, CO Woodland Park

Pat's Pony Express - 8 MilePat's Pony Express - 16 Mile

From $65 Open 75 spots left

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Into the Hills Eltuck 10k

Tue, Aug 11 · Bellvue, CO Bellvue

Into the Hills Eltuck 10k

From $25 Open

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The Cheyenne Mountain Run

Sat, Aug 15 · Colorado Springs, CO Colorado Springs

5K10K25K

From $40 Open

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Into the Hills Eltuck 5k

Tue, Aug 18 · Bellvue, CO Bellvue

Into the Hills Eltuck 5k

From $25 Open

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Eltuck Valley 12K - Lory Summer Trail Series

Tue, Aug 25 · Bellvue, CO Bellvue

Eltuck Valley 12k

From $25 Open

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Bluffs Run 8K

Sun, Aug 30 · Lone Tree, CO Lone Tree

8K

From $30 Open

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Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Pro DivisionSport Division (beginner / intermediate)Expert Division

From $90.15 Open

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Trail Sisters Women's Half Marathon & 10k

Sat, Sep 12 · Buena Vista, CO Buena Vista

Trail Sisters Women's 10kTrail Sisters Women's Half Marathon

From $55 Open

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53rd Annual Imogene Pass Run

Sat, Sep 12 · Telluride, CO Telluride

53rd Annual Imogene Pass Run

From $130 Open

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Red Feather Trail Jamboree

Fri, Sep 25 · Red Feather Lakes, CO Red Feather Lakes

Red Feather Trail Jamboree Half MarathonRed Feather Trail Jamboree 50 MileRed Feather Trail Jamboree 50km +1

From $90 Open

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Estes Epic

Sat, Sep 26 · Estes Park, CO Estes Park

Heavy Half Marathon50k Run50k Bike +1

From $80 Open Closing Soon

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West Line Winder

Sat, Sep 26 · Buena Vista, CO Buena Vista

50k30k

From $105 Open

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OUTLAST COLORADO SPRINGS

Sat, Sep 26 · Colorado Springs, CO Colorado Springs

6 Hour Challenge

From $90 Open

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Sangre de Cristo Trail Festival

Sat, Sep 26 · Westcliffe, CO Westcliffe

8-Mile27k50k +3

From $40 Open

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Mountain Marmot Trail Run presented by Durango Running Company

Sat, Sep 26 · Durango, CO Durango

Mountain Marmot Trail Run

From $85 Closed

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Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile)

Sun, Sep 27 · Larkspur, CO Larkspur

Greenland Open Space 3 MileGreenland Open Space 8 Mile

From $60 Open 85 spots left

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HRCA Wildcat Mountain Trail Races

Sat, Oct 3 · Littleton, CO Littleton

10K10MKid's Race

From $10 Open

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OUTLAST DENVER

Sat, Oct 3 · Littleton, CO Littleton

6 Hour Challenge

From $90 Open

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Rubey Rescue Run

Sun, Oct 4 · Aspen, CO Aspen

1 Mile3.5M Trail Run

From $60.38 Open

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Suffer Better 10th Annual Fall Trail Runs

Sat, Oct 10 · Pine, CO Pine

Suffer Better 25K - FishSlappers DivisionSuffer Better 25KSuffer Better 50K +1

From $25 Closed 30 spots left

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Indian Creek Trail Runs

Sat, Oct 17 · Sedalia, CO Sedalia

5-Mile15-Mile55k +1

From $30 Open

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Blue Sky Trail Marathon & Half Marathon

Sat, Oct 17 · Fort Collins, CO Fort Collins

Blue Sky Trail Half MarathonBlue Sky Trail Marathon

From $90 Open

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HRCA Backcountry Wilderness Half Marathon

Sat, Nov 7 · Lone Tree, CO Lone Tree

Half Marathon

From $65 Open

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Sawmill Trail Runs

Sat, Dec 5 · Pine, CO Pine

8-Mile16-Mile50k

From $60 Closed

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Stories Trail Runs

Sat, Feb 6 · Colorado Springs, CO Colorado Springs

10k10kHalf Marathon +11

From $60 Closed

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22nd Annual Run Through Time Trail Marathon and Half Marathon

Sat, Mar 13 · Salida, CO Salida

A Run Through Time 2 Mile RunA Run Through Time 2 Mile RunA Run Through Time Trail Half Marathon +3

From $15 Closed

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Endure Trail Runs

Sat, May 15 · Divide, CO Divide

10k10kHalf Marathon +7

From $60 Closed

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Summits Trail Runs

Sat, Jun 12 · Granby, CO Granby

6-Mile6-MileHalf Marathon +7

From $60 Closed

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