Trail Runs in Colorado — 2026

There are 30 trail runs in Colorado scheduled for 2026. The next is the 21st Annual Run Through Time Trail Marathon and Half Marathon in Salida on March 14. Colorado trail runs run primarily March through February.

21st Annual Run Through Time Trail Marathon and Half Marathon

Sat, Mar 14 · Salida, CO Salida

A Run Through Time 2 Mile RunA Run Through Time Trail Half MarathonA Run Through Time Trail Marathon

From $15 Open Closing Soon

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Run the Ranch

Fri, Apr 10 · Loveland, CO Loveland

5k10k (heavy)Virtual 4HR/6HR12HR +6

From $45 Open

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Quad Rock 25 & 50 Mile Trail Races

Sat, May 9 · Bellvue, CO Bellvue

Quad Rock 25Quad Rock 50

From $125 Open

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Endure Trail Runs

Sat, May 16 · Divide, CO Divide

10kHalf MarathonMarathon +2

From $60 Open

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Farish Trail Race

Sat, May 23 · Woodland Park, CO Woodland Park

Kids Run5K10K +1

From $0 Open

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Summits Trail Runs

Sat, Jun 6 · Granby, CO Granby

6-MileHalf MarathonMarathon +2

From $60 Open

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Garden of the Gods 10 Mile/10K and Trail Run

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

Trail Run10 Mile10K

From $60 Open

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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 10KNEW 26 Mile Mountain Bike Relay (Teams of Two) +8

From $0 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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Audi Power of Four Trail Run

Sat, Jul 18 · Aspen, CO Aspen

10K Run25K Run50K Run

From $105 Open 75 spots left

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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 Closed

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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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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 Closed

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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 50kmRed Feather Trail Jamboree 50 Mile +1

From $90 Open

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Sangre de Cristo Trail Festival

Sat, Sep 26 · Westcliffe, CO Westcliffe

8-Mile27k50-Mile +3

From $40 Open

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Estes Epic

Sat, Sep 26 · Estes Park, CO Estes Park

Heavy Half Marathon50k Bike50k Run +1

From $80 Open

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West Line Winder

Sat, Sep 26 · Buena Vista, CO Buena Vista

50k30k

From $105 Open

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HRCA Wildcat Mountain Trail Races

Sat, Oct 3 · Littleton, CO Littleton

10M10KKid's Race

From $10 Open

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Rubey Rescue Run

Sun, Oct 4 · Aspen, CO Aspen

3.1M Trail Run

From $60.38 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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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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