Event details subject to change. Please confirm all information via event website.
Desert RATS Trail Running Festival
Desert Rats Trail Running Festival by UTMB has four unique distances, three days of racing and indescribable views of the desert. There is something for every runner. Enjoy views of the Colorado River as you race through flowy singletrack, climb up the mesa, and take in the vastness of the desert.
NoCo Urban Ultra & Relay
A collaboration event between run.Windsor and Breakaway Athletic Events celebrating the Poudre River Trail. This long-distance race takes you on a sprawling tour of Northern Colorado via the picturesque Poudre River Trail. You'll enjoy scenic views and local amenities through Fort Collins, Timnath, Windsor and Greeley. While ultra distances can be daunting, this race is an ideal option for […]
Platte River Half Marathon
Denver's oldest half marathon runs along the Platte River Trail, covering parts of Littleton and Denver.
Spring Fling Prairie Dog Half
Apex Center 13150 W 72nd Ave, Arvada, CO, United StatesWelcome to the SPRING FLING Prairie Dog Half, part of the Prairie Dog Half Race Series. This spring-time event also features 10k & 5k distances!
Donut Dash
The Donut Dash 5K is Denver’s race that ends with doughnuts. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh doughnuts at the finish. Our mission is to bring people together to have a fun, fit morning.
Boulder Track Series #1
Niwot High School 8989 Niwot Road, Niwot, CO, United StatesWe are pleased to offer 2 x Spring track meets (4/12 & 5/3), for middle distance and distance runners, that will be conducted similarly to the BMC (British Milers Club) meets. All meets will be held at Niwot High School (8989 Niwot Rd, Niwot, CO 80503). ADDITIONAL NOTES There are NO age restrictions for the […]
Rattler Trail Race
Rattler was created to feature one of Colorado Springs' best city parks, Palmer Park. Runners will enjoy views of the city and Pikes Peak from the sandstone bluffs, while running all of the best trails the park has to offer! Even though the course does not have much vertical gain, it will test runners with […]
All-Out Beat the Heat
One of Colorado's favorite trails meets one of its most glorious parks at our 11th annual Beat the Heat! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into view. Its Endless Series sidekick in September is Fallfest. 5K, 10K, Half Marathon
Polar Plunge 5K
Are you ready for the COOLEST event of the season! Whether you're a daring plunger, a speedy 5K runner/walker, or a thrill-seeker ready to do BOTH, the Polar Plunge & 5K promises non-stop excitement and heart-pumping fun - all while supporting Special Olympics Colorado. Take the plunge into a chilly pool, dash through the 5K, or double […]
Great Western Trail Race
The Great Western Trail is a wide unpaved trail located in rural Weld County in Northern Colorado. The trail connects to the Windsor Trail system on the northeast edge of the Town of Windsor, traveling north to the Town of Severance. From Severance, the trail curves east, and runs through open agricultural lands 7.5 miles […]
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