All-Out Runapalozza

Apex Center 13150 W 72nd Ave, Arvada, CO, United States

As those summer mornings are just beginning to cool, join us for a celebration to end the season and our 11th Annual Runapalooza! From the award winning Apex Center, these 5K, 10K & Half Marathon courses will run west along the 2020 Best of the Best Ralston Creek Trail through Arvada's open spaces and stunning golf […]

Boulder Rez Marathon

Boulder Reservoir 5565 N 51st St, Boulder, CO, United States

The Boulder Rez Marathon is quickly becoming a Boulder classic! This isn’t just another run around the lake. September temperatures will create the perfect race atmosphere. BBSC will offer a Marathon, ¾ Marathon, Half Marathon, 10K and relay, guaranteeing the perfect distance for you! This popular course will take runners around the Boulder Reservoir on […]

Run for the Ring 5K

Barbara Davis Center for Diabetes 1775 Aurora Ct., Aurora, CO, United States

Starting and finishing at the Barbara Davis Center for Diabetes (BDC), race entry for the 5K and the Kids Zone/Fun Run opens May 16, 2024, with an early bird discount through June 28. Regular registration runs from June 29 to July 30, and “day-of” registration goes from July 31 to race day, August 3. Last year, […]

Flying Colors 5K

Loudy Simpson Park 1009 S Ranney St, Craig, CO, United States

Join us for an untimed Fun Run/Walk to benefit Hospice in our community.  The run will kick off a fun weekend in conjunction with the Moffat County Hot Air Balloon Festival.  Participants will be splashed with vibrant color along the beautiful trails of the Yampa River at Loudy Simpson Park.  Enjoy live music and soaring hot […]

Staunton State Park 20K

Staunton State Park 12102 S Elk Creek Rd, Pine, CO, United States

Join us at Staunton State Park for a beautiful 20k trail race. Runners will start at 8,215 feet of elevation and reach an elevation of 9,579 feet at the Eagle Cliff Overlook. Please bring a water bottle. Download the race map (PDF).

Berry Picker Trail Run

Vail Village 292 E Meadow Dr, Vail, CO, United States

The Dynafit Berry Picker Trail Run begins at 8 a.m. at the base of Gondola One in Vail Village, testing runners of all abilities on both singletrack and doubletrack terrain over 4.6 miles of uphill running with an average grade of 14 percent. The race ends at Mid-Vail at the top of Gondola One. Competitors […]

Arapahoe Warrior 5K

Arapahoe High School 2201 E. Dry Creek Rd, Centennial, CO, United States

Come out and support the Arapahoe Warrior Cross Country team at the 3rd annual Arapahoe Warrior 5K. $10.00 of every registration goes directly back to the Arapahoe Cross Country Booster team.

Kennebec Mountain Run

La Plata Canyon Durango, CO, United States

The Kennebec Mountain Run is a tough, scenic 15ish-mile trail run through the La Plata Mountains, just west of Durango in southwest Colorado. Some people like to say that KMR is a perfect tune-up for the Imogene Pass Run, but really, Imogene is a perfect cool-down after Kennebec, and a wonderful introduction to the La Platas!

Unicorn 5K

Highland Heritage Park 9651 S Quebec St, Highlands Ranch, CO, United States

Run, walk, frolic, or gallop The Unicorn 5k & Kids Dash in Highlands Ranch! - 5k FINISHER MEDALS - TIE-DYE UNICORN TEE - COTTON CANDY - COSTUME CONTEST - BALLOON ART - FACE PAINTING If smiles, rainbows, and shimmering FINISHER MEDALS are your thing, then this race is for YOU! EVERY 5k finisher receives a […]

PPRR Nielson Challenge

North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United States

Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]

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