Event details subject to change. Please confirm all information via event website.
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 Peaks of Southern Colorado have been among the most important landmarks of the southwestern United States, guiding Native American tribes, Spanish and French trappers, gold […]
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 as they traverse through the Gunnison National Forest. At the lower elevations, stunning wildflowers set against mountain backdrops will greet runners as they work their […]
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 descend into the heart of Minturn in the middle of leaf peeping season! This race is capped at 175 participants, so sign up early to […]
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 to as “The Terry Bison Incline”, and buffalo trails. This scenic course is at times challenging but worth it for the amazing and unique views! […]
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 Elevation of 7,240 Feet. This is a low fanfare community-driven event, simply geared towards those who love to push their mental and physical limits while […]
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 to change the lives of local patients, survivors, and caregivers!
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 March 2013. The purpose of this 5K Run/Walk is to unify the local community in commeration of her life and raise funds for a college […]
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 Eagle Park! Timing is variable since the sheep march to the beat of their own drum, but the tentative start time is 10:30am. Come experience […]
Black Canyon Triathlon
The Montrose Recreation Foundation proudly presents the 22nd Annual Black Canyon Triathlon will be held Saturday, September 30, 2023. This event attracts about 200 athletes and their families annually to Montrose. It is a well supported sprint distance triathlon. There are individual youth and adult divisions, plus adult and youth teams(2 or 3 members). We […]
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 / REGISTRATION AFTER SEP 1 st $50 WHAT: Annual 5k race. Prizes for first and second place winners in each category. Enjoyment for ALL! Racers can […]
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 a relay team to divide and conquer the total elevation gain. Athletes race up the mountain, ride the gondola down, and do it all again […]
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 the 5K or 2K route, you’ll be part of a vibrant day filled with color, movement, and connection.
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. If you finish early, you rest until the next round. Miss a lap, and you’re out. Complete all six rounds, and you OUTLAST.
Desert’s Edge Triathlon
JOIN US AT THE EDGE OF THE DESERT IN WESTERN COLORADO FOR THE 2026 DESERT'S EDGE TRIATHLON SERIES sprint, Olympic, Collegiate draft legal, and Off-Road sprint RACES
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 a nonprofit, volunteer-driven organization that arranges free, non-emergency air travel for children and adults with serious medical conditions and other compelling needs. Our network of […]
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 roads on five private ranches only accessible by participating in this event. The spectacular scenery includes views of the San Juan Mountains, the True Grit […]
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, now you’re going to find out! The Mountain Marmot Trail Run is an epic trail race. The course is simple — start at the bottom […]
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 the grill.
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 Corral. At the corral the singletrack starts and racers will enter the Aspen-filled woods lining the deep creek trail on their journey back to the […]
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, Neon and Black Lights! Cross the finish line into an Epic Main Stage After Party featuring Top Headliner DJs! To date, over 1.5 MILLION people […]
RMRR Fall Marathon Training Series #3
Riverwalk Ballfields 9830 Riverdale Rd, Thornton, CO, United StatesRMRR’s Marathon Training Series provides 10M and 20M races that are low cost, friendly, fully supported, and officially timed. All you need to do is focus on your running! Our races fit perfectly in training schedules for Colfax, Boston, New York, Chicago, and other full and half marathons. Everyone is welcome at our MTS races: RMRR members, […]
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 expected to sell out again this year. Run a 5k, 10k, Half, or Full, at the foothills of the Rockies, in the stunning running mecca […]
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 and a family fun venue! Did we mention camping? Yup! There’s that too. Sitting on the east side of Loveland and southeast of Fort Collins, […]
Pat Mahan Memorial 5K
Join us for the Pat Mahan Memorial 5K in Wiggins, Colorado, a family-friendly event celebrating the life and legacy of Pat Mahan. Lace up your running shoes and hit the course with us as we raise funds to support local students through the Pat Mahan Memorial Foundation, which provides scholarships to graduating seniors at Wiggins […]
Colorado Coyotes Youth XC Invitational
Join us for the annual Colorado Coyotes Cross Country Invitational. This meet is open to all youth runners between the ages of 6-14 years old. The course is a mix of mostly grass and crushed dirt rock with a few sidewalk crossings and a few hills. The Invitational will be professionally chip timed by Colorado […]
Flyin’ Lion 5K
The Flyin' Lion 5K returns this year to raise money to support Littleton High School’s Lions Sports Booster Club, a non-profit 501c3 made up of parent volunteers and school administrators. The race will take place at Littleton High School on October 2nd, 2022.
Run With the Wolves 5K
Join us for WWE's Annual 'Run with the Wolves'! Run with the Wolves is a 5k Run and 1k Fun Run/Walk that raises money for West Woods Elementary PTSA. It is a positive, healthy community event that gets your blood pumping while supporting your school. All proceeds from the race are granted back to the […]
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