Event details subject to change. Please confirm all information via event website.
Glow and Roll 5K
Glow & Roll is an inclusive, dusk-time 5K Walk/Run/Roll (with a 1.6-mile option). A glow-filled, twilight experience with lights, music and day-glow swag that transforms the event into a celebration under the evening sky. Movement in all forms is welcome whether you walk, run, use a wheelchair, or dance your way through the course. Creative […]
Louisville Fall Splash & Dash
Get ready for a fun, energetic racing experience! The event features an indoor swim in the Louisville Rec Center pool, followed by a run on the outdoor trail. This series is open to kids ages 5–14. Age Groups & Distances 5–8 yrs: 50-yard swim / 0.65-mile run 9–11 yrs: 100-yard swim / 1.3-mile run 12–14 […]
Raising the Barr Ultra
Introducing the Raising the Barr Ultra Race. Try to finish as many 10 mile loops around the lake in the first 4 or 10 hours and then switch to 1 mile loops for the last few hours of your race. Registration includes bib, t-shirt, and post-race meal.
Roost Rebellion Relays
Welcome to the Roost Rebellion Relays! Assemble your fastest 4 x 1 mile relay team to race in Washington Park. Each team needs to be co-ed with at least 2 women. Here's the catch! Each team must select at least one participant to race in Mizuno's super shoe - the Wave Rebellion Pro. This ultra […]
Front Range Ultra Dayze
Welcome to Front Range Ultra Dayze! 100 hours of ultra-running madness! Our goal is to bring people from all over the U.S. together for a festival of ultra-running in Loveland, CO. All distances are ultra-distances, because there’s no community like the ultra-running community! Runners are allowed to camp at the park from start to finish […]
Grand Traverse Mountain Run
The Grand Traverse Mountain Run is a point-to-point ultra marathon from Crested Butte to Aspen, Colorado. The course follows the route of the Grand Traverse Backcountry Ski race. In total, runners travel 40 miles across the Elk Mountains with over 6,000′ of elevation gain.
The Beaver Run
The Beaver Run is a high-altitude mountain running event held Labor Day Weekend in beautiful Breckenridge, Colorado. Participants can choose from 5K and 10K distances along Breckenridge's scenic paved recreation path system while enjoying mountain views, fresh alpine air, and a festive holiday weekend atmosphere at approximately 9,600 feet above sea level. Hosted by BA […]
Recovery Run of the Rockies 5K
Join us for the 4th Annual Recovery Run of the Rockies 5K on Saturday, September 5, 2026, at Fossil Creek Park in Fort Collins, Colorado! This professionally timed 5K brings runners, walkers, families, and community members together for an energizing morning celebrating recovery, health, and hope. Whether you are racing for a personal best, enjoying […]
Golden Harvest Half Marathon
5k/10k/Half Marathon registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal! The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a […]
Break Your Neck 5K
Come join us to celebrate the access/disability community and raise money for spinal cord injury rehabilitation and awareness. My name is Kenny White III. On November 15 of last year, I suffered a Burst fracture to my C6 vertebrae. After emergency surgery I woke up a quadriplegic. After months of rehabilitation and hard work, by […]
Creede Mountain Run
The Race Is On! The Creede Mountain Run, established in 1987, celebrates the end of summer and the beginning of fall in our small historic mountain town. This event offers participants the opportunity to enjoy the breathtaking San Juan Mountains in Colorado on a 2, 12, 22 mile, or 50K course! The race begins within […]
Cirque Series 14K
The race begins at 10,780' ft, starting at the base of Arapahoe Basin, Mountain Goat Plaza, head up to the High Noon parking lot, then to last chance. You will cross highway 6, get on the A-Basin summer road. You will follow the summer road up to Black Mountain Lodge. From Black Mountain Lodge you […]
Demon Dash 5K
Lace up your shoes and join us for the Demon Dash at its new course at the NAAC! We're excited to bring this course its new home and onto dirt! Whether you are a runner or walker, this will be a fun community event for all. This year's race will follow the high school races […]
Denver Broncos Fit 7K
All members of Broncos Country, walkers and runners alike, are invited to join the Denver Broncos for the 13th annual Broncos 7K presented by CommonSpirit, Ticketmaster, King Soopers, and Cigna on Sunday, September 6th. Participants will start at Empower Field at Mile High and head west into the beautiful Sloan's Lake neighborhood. Then, they will […]
Golden Harvest Half Marathon
5k/10k/Half Marathon registration includes a custom bib, designer shirt, and a custom finisher medal! 1 Mile registration is untimed and includes a custom bib, designer shirt, and a custom finisher medal! The kid's dash is a fun, untimed dash for our kiddos ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a […]
Labor Day Half Marathon
Celebrate the last blast of summer at the Labor Day Half Marathon. Sweat your socks off and let summer have its last hooray at Parker's Salisbury Park just a few miles southeast of Denver. There's a distance to meet every taste with a half marathon 10K and 5K.
FCA All Abilities 5K
See the Northern Colorado All-Ability communities come together in faith and sports through FCA All-Abilities. We are running for: Awareness of sports programs for all ages for individuals with disabilities Community programs for inclusion of all abilities Funds to support our all ability athletes, coaches, equipment, facilities and programs
Gold Roots Trail Series #4
Courtney Ryley Cooper Park 2350 Colorado Blvd, Idaho Springs, CO, United StatesRun the Mighty ARGO hill this summer in a 4 race series! You will have the option of a short loop (~5 miles, ~750' gain) or a long loop (~9 miles, ~1400' gain). Both loops climb the Rosa Gulch trail and come down Virginia Canyon. Start and end in Courtney Ryley Cooper Park. Routes subject […]
American Heroes Run
The tragic events of 9/11/01 changed our nation forever. Let us not forget our proud history and those who fight everyday to keep us free. Please join us for this special day on this beautiful, flat, fast 1.05-mile loop course. The 100-mile race cutoff is 30 hours. No politics, just patriotism. - David Clark #WeAreSuperman […]
Flaming Foliage Relay
Flaming Foliage is a 165 mile overnight team relay race adventure with single track trails, from Idaho Springs to beautiful Buena Vista, over Guanella, Georgia & Fremont Passes. Since 2013, Flaming Foliage has provided teams and runners with a life changing relay adventure with experiences and views you will never forget. Each team consists of […]
Res Hill Ruck 5K
Join us for a 5K on September 11th for a memorial run/ruck through the pine trees on Reservoir Hill with breath taking views of Pagosa Springs. The trail includes just under 1,000ft of elevation gain and loss. Those who complete the course with a 10-pound pack will receive a commemorative t-shirt and those who complete […]
Snow Mountain Ranch Trail Festival
Join us at the YMCA of the Rockies in Granby for the annual Snow Mountain Ranch Trail Running Festival. This event features 4 races with 2 different "challenges". Races will include a 50K, 33K, Half Marathon,10K and 5K. Challenge yourself with our popular "Moosehead Challenge" and "Baby Moose Challenge" by completing multiple events in a […]
Littlefoot Sprint Triathlon
Enjoy a fun late season tri at beautiful Bear Creek Lake Park in a land before time. Set at the base of the foothills, the Littlefoot Triathlon starts off with a 750 meter swim in Big Soda Lake, with water temps expected to be approximately 70 degrees. Next, a rolling 15K bike ride on smooth […]
Black Squirrel Half Marathon
The Black Squirrel Trail Half Marathon takes place on the wonderful trails of Lory State Park to the northwest of Fort Collins, CO. The trail half marathon course offers a tour of the outer boundaries of Lory State Park, providing breathtaking views to the east of Horsetooth Reservoir, Fort Collins and the Great Plains; and […]
Devil on the Divide 50K/22K
We are pleased to present one of the most beautiful and challenging trail racing events in the state of Colorado with breathtaking (literally and figuratively) views of Clear Creek County and the Continental Divide. Participants will reach a top altitude over 13,000 feet. The 50K course climbs over 6500 feet. Due to the difficulty and […]
5K on the Runway
Run down the Runway at Denver International Airport, one of top 10 busiest airports in the world! Only one other time has DEN shut down a runway for this 5K on the Runway. Join us for this rare opportunity for you to pilot yourself down a runway. Very limited number of spots available. This event […]
Steele Trap Trail Run
A fresh take on trail running that ditches the big-budget hype for pure, no frills adventure. Forget the lottery entries, $200+ fees, swag bags, and finish line blow up arches. This is trail running stripped back to what it should be: you, the dirt, friends new and old, and zero corporate polish. We're keeping it […]
Lake Nighthorse Triathlon
Scenic and hilly Sprint and Olympic(standard) distance triathlons held at Lake Nighthorse Recreation Area in Durango 9/6/25 with prize money for top 3 overall male and female racers.
CMRA South Seven
The course will be on wide, crushed gravel paths and, depending on the status of construction in the nearby neighborhood, potentially a little bit of single track. It's a hilly, but very run-able course, a few ups and downs during this 7 mile course! We'll travel "the wrong way" around the standard Bluffs route before […]
Gleneagle Spirit 5K
The 2025 Gleneagle Spirit 5k is the Fourth annual event held in the Gleneagle community. The event features a 5k Run/Walk for Fun that winds through the streets of the Gleneagle Neighborhood in Northern El Paso County. The event is organized and presented by two neighborhood Realtors (Blair Dinkins and Mark Rudolph) with volunteer assistance […]
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