Trail Runs in Colorado — 2026

There are 35 trail runs in Colorado scheduled for 2026. The next is the Quad Rock 25 & 50 Mile Trail Races in Bellvue on May 9. Colorado trail runs run primarily May through March.

Quad Rock 25 & 50 Mile Trail Races

Sat, May 9 · Bellvue, CO Bellvue

Quad Rock 25Quad Rock 50

From $125 Open Closing Soon

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The Great CO74 Trail Run

Sat, May 9 · Kittredge, CO Kittredge

The Great CO74 Trail RunThe Great CO74 Kids Run

From $20 Open Closing Soon 35 spots left

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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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Gold Roots Trail Series

Wed, Jun 10 · Idaho Springs, CO Idaho Springs

Gold Roots - Race 2Gold Roots - Race 1Gold Roots - Race 4 +1

From $0 Closed

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

Sun, Jun 14 · Colorado Springs, CO Colorado Springs

10 MileTrail Run10K

From $60 Open Closing Soon

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Sunset Trail Running Festival

Sun, Jun 21 · Boulder, CO Boulder

Kids 1K5K12K +1

From $15 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 10KHighschool/Middle School Long Course (13 miles) +8

From $0 Open

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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

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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 Closing Soon 75 spots left

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Sheep Mountain Trail Runs

Sat, Aug 1 · Fairplay, CO Fairplay

Half Marathon50k50-Mile

From $70 Open Closing Soon

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Kennebec Mountain Run

Sat, Aug 1 · Hesperus, CO Hesperus

15 Mile

From $75 Open

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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 50 MileRed Feather Trail Jamboree 50km +1

From $90 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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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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Estes Epic

Sat, Sep 26 · Estes Park, CO Estes Park

Heavy Half Marathon50k Run50k Bike +1

From $80 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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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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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

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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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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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