Event details subject to change. Please confirm all information via event website.
Wolf Creek Wrangle
Take a step back in time and run or hike where the settlers of the west once walked! These trail runs are hosted by the historic Eaton's Ranch, the country's […]
Canceled ColorFest Color Run 5K
Brilliant colors will be flying at Pagosa Springs' iconic ColorFest Color Run 5k. As participants venture out on the course, vibrantly hued hot air balloons will be filling the skies […]
Battle by the Brook
The 9th Annual Battle by the Brook Adventure Race will be held on September 19th, 2026 at Camp Shady Brook, in Deckers, CO. This is our favorite fundraiser! With your […]
Stride for Hope 5K
Did you know September is Childhood Cancer Awareness Month? Join Confluence Run/Walk Club on Saturday, September 19th, 2026 for the Stride for Hope 5K & Kids Fun Run—a high-energy, family-friendly […]
Blisters & Brews 5K
Blisters & Brews is a 5k Fundraiser Race on the morning of Saturday, September 14, giving Festival attendees the opportunity to exercise before the Festival. Presented by the Telluride Blues […]
Beulah Challenge
Due to the Aspen Acres Fire, the half marathon had been cancelled in 2026. The Beulah Challenge, which started in 1996, is a 5K, 10K, and half-marathon run near Beulah, a small […]
Miles 4 Madison 5K
Join us in Sterling Ranch for the Miles 4 Madison 5k/1k fun run. Miles 4 Madison is a 5K/1K fun run sponsored by Sterling Ranch Cab. Miles 4 Madison’s goal […]
Gummball 5K
The Gummball 5K will be run in honor of our fallen brother, Deputy Heath Gumm. He paid the ultimate sacrifice on January 24, 2018. Within his five years with the […]
Champions for Children 5K
Lace up for a race that truly matters. We are thrilled to extend a special invitation to the Colorado running community for the 3rd Annual Champions for Children Charity 5K […]
STAR Foundation 5K
Enjoy warm late-summer sunshine as you run through the welcoming streets of Wellington, Colorado. With wide-open views, small-town charm, and community cheer along the course, this race is perfect for […]
Autumn Run Half Marathon
The Autumn Run is held each year on the third weekend in September, in and around the historic, friendly, and picturesque town of Buena Vista, Colorado. Nestled in the upper […]
Montbello Alive! 5K
Join us for the Montbello Alive 5K, a vibrant community event that brings together runners, walkers, and families for a day of fun, wellness, and celebration. This race is part […]
Walk With Autism
Come join us for a fantastic day to celebrate inclusion and community! We welcome all levels of participants and we welcome all people- this is a no sorry zone. This […]
Lederhosen Run
The Tavern at Red Feather Lakes is planning this year's Oktoberfest on Saturday, September 19th. As a part of the festivities, Caring Hearts of Red Feather Lakes Foundation is putting […]
Fall Equinox Half Marathon
Held on the Autumnal Equinox during the height of fall color, the Equinox Marathon, Half Marathon and 5-miles races are all point-to-point, net downhill, scenic courses along the Cache La Poudre River in Fort Collins. This year, the event will take place on September 18th.
Pikes Peak Marathon
The Pikes Peak Marathon, founded in 1956, is the oldest continually held marathon in the United States, taking runners from Manitou Springs, Colorado, to the summit of Pikes Peak at […]
Oktoberfest Triathlon
The annual Oktoberfest Triathlon on Saturday September 24th, 2022, is the party of the season and also a 2022 Mountain Collegiate Conference Race! As the leaves change color this race […]
Second Wind Fund 5K
Youth across Colorado are facing growing mental health challenges, and more than ever, they’re reaching out for support. Second Wind Fund is here to answer that call, connecting youth at […]
Golden Gallop 5K/10K
“Howdy Folks! Welcome to Golden, where the west RUNS!” Starting beneath the City’s famous ‘Welcome’ arch, right in the center of historic downtown Golden, and finishing in Parfet Park beside […]
Chile & Frijole Hot to Trot
The Chile & Frijole Hot to Trot Race will be held on the last day of the Pueblo Chile & Frijoles Festival. The festival features live entertainment, street vendors, cooking competitions, […]
Connection 5K
True Nature is hosting the first Connection 5K on September 20th at 8:00am to raise awareness and support for Connection is the Medicine Foundation. The run will start and finish […]
Farmers 5000
The Farmers 5000 is likely one of the very first school-based 5K fundraisers in the state of Colorado. Since 1981, serious racers and weekend warriors alike have been coming to […]
Race Against Suicide
Suicide is one of the leading causes of death in the state of Colorado. This scary reality is something we can work together to change. Pikes Peak Suicide Prevention Partnership […]
Paul’s Mystery Ship To End ALS Walk
Paul’s Mystery Ship To End ALS launched in 2020 following Paul Dannels battle with ALS, a disease causing profound physical changes for individuals and families. Our foundation brings hope amid […]
Red Feather Trail Jamboree
Come enjoy the clean air and wild spaces of the Red Feather Lakes region in Northern Colorado at the Red Feather Trail Jamboree on September 17th. This 50K and half marathon takes place at the Ben Delatour Scout Camp and are designed to be beginner (or PR) friendly.
Sangre de Cristo Ultras
Come join us on the Rainbow Trail in the Sangre de Cristo mountains. Run beneath the watchful eye of these gorgeous, and ominous, mountains. This race is full of festivities, […]
WILD Wahatoya Runs
Announcement: All Course Profiles and GPX files are released on the race website! Come join us to run through a magical part of history in the Cuchara Valley. The Spanish […]
Crested Butte Ultra
Crested Butte is known for having some of the best trails in the country. Runners will be challenged by this high altitude course. Its wide open views will amaze runners […]
Cougar Ridge Classic
Join the Vail Recreation District for the annual Cougar Ridge Classic 26K, a point-to-point sub-ultra trail race. Challenge your legs, lungs and mind as you climb up Vail Mountain and […]
West Line Winder 50K
With glorious views of the Collegiate Peaks and 4,000ft of ascent along the way, these 30 miles of buttery single track and forest roads in the heart of the valley are perfect for everyone from the first time 50k’er to the veteran trail runner. Join the fun on September 25th in Buena Vista, CO.
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