Trail Runs in Colorado — 2026

There are 19 trail runs in Colorado scheduled for 2026. The next is the Blue Sky Trail Marathon & Half Marathon in Fort Collins on October 17. Colorado trail runs run primarily October through September.

Suffer Better 10th Annual Fall Trail Runs

Sat, Oct 10 · Pine, CO Pine

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

From $25 Closed 30 spots left

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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 Closing Soon

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Indian Creek Trail Runs

Sat, Oct 17 · Sedalia, CO Sedalia

5-Mile15-Mile55k +1

From $30 Open Closing Soon

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Chili Chase

Sat, Oct 17 · Durango, CO Durango

Chili Chase

From $40 Open Closing Soon 49 spots left

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McGraw Memorial Park "Quick Draw @ McGraw" 2.1 & 12.6 Mile Trail Races

Sat, Oct 24 · Bailey, CO Bailey

2 Mile *VIRTUAL* Trail Run/ Walk2 Mile Trail Walk or Walk/Run2 Mile Trail Run +1

From $25 Open Closing Soon

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HRCA Backcountry Wilderness Half Marathon

Sat, Oct 31 · Lone Tree, CO Lone Tree

Half Marathon

From $65 Open Closing Soon

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Kessel Run Ultra

Sat, Nov 7 · Fruita, CO Fruita

10 Mile20 Mile40 Mile +2

Closed

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Lone Tree Reckoning Heavy 15K and 5K

Sat, Nov 14 · Loveland, CO Loveland

5KHeavy 15K

From $45 Open

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Sawmill Trail Runs

Sat, Dec 5 · Pine, CO Pine

8-Mile16-Mile50k

From $60 Open

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Stories Trail Runs

Sat, Feb 6 · Colorado Springs, CO Colorado Springs

10k10kHalf Marathon +11

From $60 Open

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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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Farish Trail Race

Sat, May 22 · Woodland Park, CO Woodland Park

Kids Run5K5K +4

From $0 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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Sheep Mountain Trail Runs

Sat, Aug 7 · Fairplay, CO Fairplay

Half MarathonHalf Marathon50k +3

From $70 Closed

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Sangre de Cristo Trail Festival

Sat, Sep 25 · Westcliffe, CO Westcliffe

8-Mile8-Mile27k +9

From $40 Closed

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