Trail Runs in Colorado — 2026

There are 29 trail runs in Colorado scheduled for 2026. The next is the Cirque Series - Arapahoe Basin, CO in Keystone on September 5. Colorado trail runs run primarily September through August.

Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Pro DivisionSport Division (beginner / intermediate)Expert Division

From $90.15 Open Closing Soon

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Res Hill Ruck

Fri, Sep 11 · Pagosa Springs, CO Pagosa Springs

Res Hill Ruck

From $40 Open Closing Soon

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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 Closing Soon

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53rd Annual Imogene Pass Run

Sat, Sep 12 · Telluride, CO Telluride

53rd Annual Imogene Pass Run

From $130 Open Closing Soon

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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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OUTLAST COLORADO SPRINGS

Sat, Sep 26 · Colorado Springs, CO Colorado Springs

6 Hour Challenge

From $90 Open Closing Soon

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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 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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West Line Winder

Sat, Sep 26 · Buena Vista, CO Buena Vista

50k30k

From $105 Open

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Estes Epic

Sat, Sep 26 · Estes Park, CO Estes Park

Heavy Half Marathon50k Bike50k Run +1

From $105 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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OUTLAST DENVER

Sat, Oct 3 · Littleton, CO Littleton

6 Hour Challenge

From $90 Open Closing Soon

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HRCA Wildcat Mountain Trail Races

Sat, Oct 3 · Littleton, CO Littleton

10K10MKid's Race

From $10 Open Closing Soon

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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 Open 30 spots left

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Chili Chase

Sat, Oct 17 · Durango, CO Durango

Chili Chase

From $40 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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Indian Creek Trail Runs

Sat, Oct 17 · Sedalia, CO Sedalia

5-Mile15-Mile55k +1

From $30 Open

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McGraw Memorial Park "Quick Draw @ McGraw" 2 Mile Trail Race

Sat, Oct 24 · Bailey, CO Bailey

2 Mile Trail Walk or Walk/Run2 Mile Trail Run2 Mile *VIRTUAL* Trail Run/ Walk

From $25 Closed

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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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Samson's Revenge

Sat, May 22 · Estes Park, CO Estes Park

10k10k25k +3

From $95 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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Race in the Clouds - Alma Dirt Festival 2027

Fri, Jun 25 · Alma, CO Alma

Highschool/Middle School Short Course (6.1miles)Highschool/Middle School Short Course (6.1miles)Trail 10K +21

From $0 Open 10 spots left

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Silverheels Trail Runs

Fri, Jul 9 · Como, CO Como

10-Mile10-Mile19-Mile +9

From $50 Closed

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Kennebec Mountain Run

Sat, Aug 7 · Hesperus, CO Hesperus

15 Mile15 Mile

From $75 Closed

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