Event details subject to change. Please confirm all information via event website.
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 […]
Expo Park XC Runs
Old-school cross-country style courses with creek crossings and bale jumps. Youth races 1k - 4k. All-ages 5k. Individuals and teams.
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.
Monument Marathon
Register for Nebraska’s Most Beautiful Race - the Monument Marathon, Half Marathon and 5K on September 24th in Gering, just two hours from Fort Collins. Experience towering natural landmarks, pine-covered hills, rugged badlands, and a rural landscape that provides a stunning and tranquil experience. Run along part of the Oregon Trail, the course traverses through Mitchell Pass and around Scotts Bluff National Monument.
Great Bison Shuffle
Join the Cheyenne Regional Medical Center Foundation for this scenic trail run/walk at the Terry Bison Ranch. The terrain includes gentle rolling prairie pasture, a short rocky hill we refer […]
24 Hours of Palmer Lake
24 Hours of Palmer Lake is back! This race features 24 hours of a gorgeous 0.82 mile loop course surrounded by mountains on top of the Palmer Divide at an […]
Get Your Rear In Gear 5K
Being part of a Get Your Rear in Gear event means joining North America’s largest grassroots movement in the fight against colorectal cancer. Your actions and voice have the power […]
Lisa Nelson’s Mustang Stampede 5K
Lisa Nelson's Annual Mustang Stampede 5K Memorial Scholarship Run/Walk in memory of Lisa Nelson, a beloved faculty member of Ralston Valley High School. Lisa passed away from cervical cancer in […]
Heritage Days 5K
Enjoy a beautiful, fun 5k after watching the sheep come through town, and the parade. We will start at the end of the parade on Mill Street and end at […]
Mesa County Search & Rescue 5K
Fruita Fall Festival - Mesa County Search & Rescue 5K Race HOSTED BY MESA COUNTY SEARCH AND RESCUE SUPPORT OUR MISSION TO RESCUE AND SAVE LIVES EARLY REGISTATION $35 / […]
Elevation Everest
Elevation Everest is a race series held at Winter Park Resort in Colorado that offers hiking/trail running events centered around one goal: elevation gain. Choose to race solo or make […]
Suicide Prevention Color Walk/Run
Join us for the Suicide Prevention Color Walk/Run in Center, Colorado! This family-friendly event brings our community together to raise awareness, spread hope, and support mental health. Whether you choose […]
Outlast Colorado Springs
OUTLAST is a 6-hour trail endurance challenge where runners complete a 5K every hour, on the hour. Each lap must be finished within the hour to stay in the event. […]
Run for the Angels 5K
If you've ever wanted to run on an airport, this is your chance! Angel Flight West is proud to present the Run for the Angels 5k! Angel Flight West is […]
John Wayne True Grit Trail Half Marathon
The True Grit Run meanders through the forest at the base of the San Juan Mountain where True Grit was filmed. The courses run on single track trails and fire […]
Mountain Marmot Trail Run
Have you ever stood at the bottom of a mountain, staring up at the top, thinking to yourself: “I wonder if I could run all the way up there?” Well, […]
Run For Your Flapjacks 5K
Enjoy the first weekend of fall with a breathtaking workout overlooking the waters of Stagecoach State Park Reservoir then savor warm cider with a delicious stack of flapjacks hot off […]
Deep Creek Trail Half Marathon
This spectacular trail run will start at the beginning of Last Dollar Road by the Telluride Airport. Racers will make their way down Last Dollar Road to the Deep Creek […]
Night Nation Run
The Night Nation Run is the World’s first Running Music Festival the ultimate blend of a Music Festival and a Fun Run. Experience a music filled course with Live DJs, Bubble Zones, Light Shows, […]
Sawatch Ascent 50K
Built to showcase the stunning beauty of the Sawatch Range, this high alpine and vert-heavy 50K will challenge and inspire you in equal measure! From starting under the shadow of Mount Princeton and the endless miles of buttery, aspen shaded Colorado Trail singletrack, to the awe-inspiring high point of 13,150ft and panoramic views of Colorado’s highest range, you will get to experience the wonders of the Sawatch over 33 miles and 7,000ft of vertical gain.
Boulderthon
Run one of the fastest-growing, top-rated marathons in the country! After nearly tripling in size and selling out last year, Boulderthon has instituted a new 5,000 runner cap and is […]
Last Call Triathlon
Yes! I want ONE MORE adventure!! Escape to the lake! The Last Call Triathlon will be an event you’ll look forward to all season long. Why? Beautiful mountain views, great weather […]
Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.