May 16, 2026
The 10k, Half Marathon, and Marathon are great ways to enjoy Mueller State Park’s natural beauty in a supportive, “n...
May 17, 2026
It’s the Ultimate Urban Tour of Denver with epic sites. Start and finish in Denver’s City Park. Run through Empower...
May 16, 2026
Come run City Park in the Colfax 5K! Go for a PR in this chip-timed race – separate stroller-friendly start wave for ...
May 10, 2026
Get ready for an unforgettable adventure on this exciting half marathon course in Fruita, CO! This 13.8-mile loop takes ...
May 10, 2026
We are excited for the 2026 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event!We w...
May 09, 2026
This isn’t just a race — it’s a gathering of fierce, trail-loving women who lift each other up with every mile.Wom...
May 09, 2026
Celebrate Mom (or anyone) by running or walking 3.1 Miles over the Meadow in this fun-filled 5K the whole family can enj...
May 09, 2026
Join the festivities at our HRCA Mother’s Day 5K at Cresthill Middle School in Highlands Ranch on Saturday, May 9, 202...
May 09, 2026
Like Running or Walking? Love Wine? This race is for you!Join us on Saturday, May 9, 2026 at 9:30am and 11:30am (you w...
May 09, 2026
Colorado at its Best – the Carbon Valley Half Marathon showcases the beauty & diversity of Colorado’s best kept ...
May 03, 2026
Longmont's only Half Marathon - now offered in the cooler month of MAY! Join the Half Marathon or 5k distance! Walkers...
May 03, 2026
Welcome to the Colorado Marathon, one of the most stunning races in the country! This annual marathon is held in the ver...
May 03, 2026
Welcome to the Colorado Marathon, one of the most stunning races in the country! This annual marathon is held in the ver...
May 03, 2026
Welcome to the Colorado Marathon, one of the most stunning races in the country! This annual marathon is held in the ver...
May 03, 2026
Welcome to the Colorado Marathon, one of the most stunning races in the country! This annual marathon is held in the ver...
May 02, 2026
Who can turn down a morning in Garden of the Gods? We'll close the park to traffic, so runners can enjoy their race, tra...
May 02, 2026
Each season comes to an end with a celebratory 5K. This closing event gives program participants of all abilities a tang...
May 02, 2026
The DUCK WADDLE 5K race begins at east side of Estes Park Parking Structure. Each runner and walker will follow the scen...
Apr 26, 2026
Ready to gallop around Denver with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k at Great ...
Apr 26, 2026
The American Driving Academy and the Southern Colorado Runners welcome you to the 48th Annual Spring Runoff Sunday, Apri...
Apr 25, 2026
Prepare for some fun in Cañon City! Enjoy scenic views along the rim of the Royal Gorge, 900 feet above the Arkansas Ri...
Apr 25, 2026
A road half marathon & 5k in beautiful Estes Park, finishing downtown amidst the infamous Bigfoot Days Festival. Thi...
Apr 25, 2026
A road half marathon & 5k in beautiful Estes Park, finishing downtown amidst the infamous Bigfoot Days Festival. Thi...