Event details subject to change. Please confirm all information via event website.
Steamboat Marathon
Run alongside the roaring Elk River through the emerald green pastures on Country Road 129 with the snow-capped Rocky Mountains of Colorado all around and find out why the Steamboat […]
Breckenridge Brewery Half Marathon
Breckenridge Brewery - Littleton 2920 Brewery Lane, Littleton, CO, United StatesJoin us for the Breckenridge Brewery Half Marathon & 5k on June 7, 2026. Starting and ending at the Breckenridge Brewery in Littleton, CO. Join us for the Breckenridge Brewery […]
RMRR Bible Park 4K
Bible Park 6802 E Yale Ave, Denver, CO, United StatesEveryone – slow, fast, or in-between – can win at RMRR Trophy Series races. With our handicap scoring system, we predict YOUR finish time based on recent running results, giving you a great […]
Flamingo Day 5K
Join us for a fun and festive day at Denver's Sloan's Lake Park.
Deadwood Mickelson Trail Marathon
26.2 Miles of Black Hills, South Dakota Beauty!
DU Dash 5K/10K
Experience the awe-inspiring beauty of Colorado's Palmer Lake area on the Santa Fe Trail for the in-person DU Dash. Runners will traverse the trail framed by the Rocky Mountains, connecting […]
Walk to Cure Arthritis
Together, let’s walk to a lifetime of Yes! Yes, to finding solutions, better treatments and a cure. Whether you have arthritis yourself or care about someone who does, sign up […]
Vitality Walk
Washington Park - Denver 701 S Franklin St, Denver, CO, United StatesYour participation in Vitality Walk helps Parkinson Association of the Rockies (PAR) push boundaries and invest in programs and services that are a lifeline to those with Parkinson’s, their Care […]
The Big Run 5K
Celebrate five decades of running with Fleet Feet at The Big Run presented by Brooks. This timed community 5K on Global Running Day is all about summer vibes, shared memories […]
M1LE Nation Challenge
One mile. One nation. Your best time. We’re bringing runners together for a nationwide mile race, and there are two ways to cross the finish line. Participate from your favorite […]
Canceled Gold Roots Trail Series #1
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 […]
BRR Summer Track Series #1
Potts Field 4001 Discovery Drive, Boulder, CO, United StatesJoin the Boulder Road Runners as we host the premier track and field meet series in Colorado! Tradition runs deep with this legacy event. Now in its 4th decade, the […]
Barr Lake Trail Race
The Barr Lake Trail Race returns to Brighton, CO, offering beautiful lake views and a prime opportunity for new PRs. Now in its sixth year, this event features our flattest […]
All-Out Summer Breeze
From the heart of the West Metro area and the Stenger Soccer Complex, All-Out brings you our 11th annual Summer Breeze! Along with its Endless Series sidekick in January Polar […]
Climb 4 Change
Climb4Change is a unique racing event that offers various timed races on the 200-step Challenge Hill at Philip S. Miller Park. Participants ascend 178 feet at least once in any […]
Ironman 70.3
Boulder has been a household name in the world of triathlon for decades. This endurance community has built a reputation among triathletes for training hard, racing fast and enjoying every […]
Treat Trot
5k/10k/15k 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! […]
Miles for Melanoma 5K
The Melanoma Research Foundation would like to welcome you to the 2022 Denver Miles for Melanoma 5K! This annual signature event will bring together local melanoma patients, survivors, care partners, […]
Stepping Stone 5K
Stepping Stone Support Center and Trailhead Community have come together to present this amazing event to benefit adults with developmental disabilities. Complete two laps of Johnson Reservoir at Clement Park […]
Fallen Officer Fund 5K/10K
The Annual Jeremy Bitner Memorial 5K/10K Walk and Run (3.1 miles/6.2 miles) will start and finish at Cornerstone Park in Englewood, CO. This course, which is certified, not only offers […]
CMRA John Meade 6K
We will start with a loop of John Meade Park before heading onto the Cherry Hills Trail for an out-and-back short cirtcuiting the initial loop. This race will be ~3.875 […]
Sam’s Rainbow Run
Sam was a remarkable young man whose life was tragically cut short in a plane crash in September 2022. At just 23 years old, Sam had recently graduated from Colorado […]
San Juan Trail Tri
Dash, Paddle, Pedal in beautiful Ridgway State Park. Our trail tri includes a 4 mile trail run, 1.5 mile paddle (SUP) & 8.5 mile mountain bike ride. Team and individual […]
Summer Sizzle 5K
The Summer Sizzle 5K isn't just a race; it's a summer festival! Bring your friends and family to enjoy a lively atmosphere filled with music, vendors, fitness classes on the […]
Jodi’s Race for Awareness 5K
Join thousands of runners and walkers for the 17th annual Jodi’s Race to celebrate survivors and raise awareness of the signs and symptoms of gynecologic cancers. Proceeds benefit the Colorado Gynecologic […]
Howelsen Hill Trail Run
Olympian Hall 845 Howelsen Pkwy, Steamboat Springs, CO, United StatesLet the trail races begin!! This is a challenging trail run on the scenic single track trails of historic Howelsen Hill, Steamboat’s outdoor playground. The trails of Emerald are beautiful […]
Springs Downhill Mile
How fast can you run a mile? What if you got to do it on a downhill? We are partnering with RunMental to bring you the second annual Springs Downhill […]
Winter Park Hill Climb
Winter Park Resort 85 Parsenn Rd, Winter Park, CO, United StatesJoin us for a 10K hill climb, 10K run, or both. Ride up, run up, or double up! From junior athletes up to professional racers, we have a category that […]
Holy Hammers Hustle for Habitat
Fun 3 mile walk benefitting Habitat for Humanity of Metro Denver.
Canceled Tutu Dash 5K
Grab those tutus and come run with us to raise money for the Colorado Conservatory of Dance. This run/walk will be a party full of smile, music, and dancing! The […]
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