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...
Apr 19, 2026
Welcome to the 53rd running of the Horsetooth Half Marathon, presented by Fort Collins Connexion. Your race will take yo...
Apr 18, 2026
Woody’s Tortoise and Hare is a true handicap event in that it measures your fitness level based on your age, gender, h...
Apr 18, 2026
Rattler was designed to showcase the stunning trails of Palmer Park, one of Colorado Springs' top city parks. Runners wi...
Apr 18, 2026
Unleash your inner superhero at the 14th Annual Beat the Heat event! This year, we're calling all champions to assemble ...
Apr 12, 2026
Welcome to the SPRING FLING Prairie Dog Half, part of the Prairie Dog Half Race Series. This spring-time event also feat...
Apr 12, 2026
Welcome to the Platte River Half Marathon & Relay race, one of the most exciting and popular races in Denver, Colora...
Apr 12, 2026
We are excited to be partnering with the D51 Foundation. They are a great addition that will help us promote and grow th...
Apr 11, 2026
Mountain Ridge takes place near Highlands Ranch primarily on the Douglas County East-West Regional Trail. This gently ro...
Apr 11, 2026
Join the Academy of General Dentistry in the Fight Against Oral Cancer!Oral cancer can affect any area of the mouth and ...
Apr 11, 2026
This spring race features a spectator-friendly Half Marathon, 10K and 5K course. Attracting athletes from all over the w...
Apr 10, 2026
For the 6th year running and partnering with the Sylvan Dale Guest Ranch, we are bringing back an amazing and beautiful ...
Apr 05, 2026
Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marat...
Mar 29, 2026
Celebrate Spring with an early season race on scenic country roads....
Mar 28, 2026
Are you ready for the COOLEST event of the season! Whether you're a daring plunger, a speedy 5K runner/walker, or a thri...
Mar 22, 2026
Is it spring or still winter? We'll know when we run the Central Park 5k at the end of March! Celebrate the end of win...
Mar 22, 2026
All-Out Multicourse is proud to host our 14th Annual Spring Fever, a rewarding event for both novice and experienced ath...
Mar 14, 2026
POINT-TO-PINT 5k 🍻Fast point-to-point "slightly" downhill course starting at Washington Park and finishing at Odell B...