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Blue Sky Trail - Marathon

Oct 17, 2026

Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the Blue Sky courses ...

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Westy - Half Marathon | 5K

Oct 11, 2026

Join the WESTY HALF and 5k this fall!The Hometown Race Series features half marathons and 5k distance events in outlying...

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The Pretzel Run - Colorado - Half Marathon | 10K | 5K

Oct 10, 2026

Every runner receives a Collectable Bib with 3 Pull-Tags to collect their goodies at the Finish line. Each distance has...

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Long View - 5K

Oct 10, 2026

Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Lo...

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Long View - Half Marathon

Oct 10, 2026

Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Lo...

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Long View - Marathon

Oct 10, 2026

Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Lo...

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Windsor - Marathon | Half Marathon | 10K | 5K

Oct 04, 2026

Starting and ending at The Island at Pelican Lakes in Water Valley, with a great after party including food, drinks, mus...

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Rut Run - 5K

Oct 03, 2026

With the Fall Season, Estes Park shines in colors and wilderness experiences! Herds of Elk begin to roam the meadows and...

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I Can - 5K

Oct 03, 2026

You CAN 5k. This event is for EVERY ONE. EVERY BODY.You won't get lost. You won't get forgotten. You'll run (or jog ...

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HRCA Wildcat Mountain Trail Races - 10K

Oct 03, 2026

The Wildcat Mountain Trail Races showcase some of the most scenic terrain in the HRCA Backcountry Wilderness Area, givin...

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The Bear Chase - Half Marathon | 10K | 5K

Oct 04, 2026

The Bear Chase Race Endurance Festival is a 100K, 50 Mile, 50K, Half Marathon, 10K and the New 5k trail race at beautifu...

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Red Feather Trail Jamboree - Half Marathon

Sep 27, 2026

Welcome to the Red Feather Trail Jamboree, a three-day trail running weekend put on by trail runners for trail runners.C...

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So Long To Summer - 10K | 5K

Sep 26, 2026

Enjoy the end of another Colorado summer with a workout with family and friends, and then reward yourself with delicious...

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HRCA Oktoberfest - 5K

Sep 26, 2026

Put on your lederhosen and sneakers as we kick off the annual HRCA Oktoberfest 5K in Town Center on Saturday, September ...

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Run The Rockies Trail - Half Marathon | 10K

Sep 19, 2026

The 51th Annual Run the Rockies Road 10k and Half Marathon will feature the traditional Run the Rockies road race course...

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Miles 4 Madison - 5K

Sep 19, 2026

Miles 4 Madison is a 5K/1K Fun Run supported by Sterling Ranch CAB. Miles 4 Madison's goal is to provide educational and...

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Autumn Run - Half Marathon | 10K | 5K

Sep 19, 2026

The Autumn Run is held each year on the third weekend in September, in and around the historic, friendly, and picturesqu...

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All-Out Fall Fest - Half Marathon | 10K | 5K

Sep 19, 2026

Yo, check out the mic! Lace-up for the 12th Annual Fall Fest, where the beauty of Colorado's great outdoors meets the to...

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Severance Glow - 5K

Sep 18, 2026

We're heating things up after dark with Severance's 1st Glow Run!!Grab those glow sticks!...

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Spirit Of The Valley - 5K

Sep 12, 2026

Helping to Heal! The 13th Annual Spirit of the Valley Run, Walk 'N Roll 1K and 5K timed races are set for Saturday Septe...

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Snow Mountain Ranch Trail Running Festival - Half Marathon | 10K | 5K

Sep 12, 2026

Join us at the YMCA of the Rockies in Granby for the 12th annual Snow Mountain Ranch Trail Running Festival.This event f...

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The Denver - 5K

Sep 12, 2026

THE Denver 5k! Denver's Iconic Sloan Lake is the setting for the return of 'THE Denver 5k'. Celebrate with friends and f...

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Black Squirrel - Half Marathon

Sep 12, 2026

Taking place on the trails of Lory State Park to the northwest of Fort Collins, Colorado, the Black Squirrel Trail Half ...

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Thirsty 13 - Half Marathon

Aug 29, 2026

Date: Saturday, August 29, 2026Start time: 8am...