First Fridays 5K

Festival Park 199 Perry St., Castle Rock, CO, United States

Friday nights in the summer are made for spending time close to home, enjoying the beautiful weather, and unwinding from the long week. Why go anywhere else but Downtown Castle […]

Canceled Rocky Mountain 5K

Stanley Park 380 Community Dr, Estes Park, CO, United States

Escape to the mountains for some fresh air! With the Rocky Mountain Half Marathon, 5K, and Elk Double (half marathon + 5K) you can choose your own adventure! The Rocky […]

Dirty Dozen Trail 10K

VIX Ranch Park 627 North Wildhorse Dr, New Castle, CO, United States

The New Castle Rides and Reggae Festival is a celebration of trail running, mountain biking, music and community. Join them for the Dirty Dozen Tail 10K on August 6th.

CMRA/RMRR 5K

deKoevend Park 6315 S. University Blvd., Centennial, CO, United States

Join us for the August Trophy Series race and picnic at deKoevend Park in Centennial.  This year our friends with the Colorado Masters will be joining us again for a […]

Emerald Mountain Epic

Howelson Hill Steamboat Springs, CO, United States

The Emerald Mountain Epic presented by Hard Headed attracts some of the nation's best mountain bike and trail running racers, while still offering incredible opportunities for athletes of all skill […]

Canceled Rocky Mountain Half Marathon

Stanley Park 380 Community Dr, Estes Park, CO, United States

Escape to the mountains for some fresh air! With the Rocky Mountain Half Marathon, 5K, and Elk Double (half marathon + 5K) you can choose your own adventure! The Rocky […]

Sheep Mountain Ultras

Town of Fairplay Beach Beech Rd, Fairplay, CO, United States

Make no mistake, the elevation profile for The Sheep Mountain 50 mile and 50k are docile looking. However, the average elevation of over 10,500’ and copious amounts of aggressive terrain, […]

Popsicle 5K

Cottonwood Creek Park 3920 Dublin Blvd, Colorado Springs, CO, United States

What better way to end these HOT summer days than with a Popsicle 5K, AND WE'VE ADDED A 10K & HALF MARATHON?!! Come join us for a 5K, 10K, or […]

Reece’s Roundup 5K/10K

Phillip S. Miller Park 1375 West Plum Creek Pkwy, Castle Rock, CO, United States

Join the Rubino Family at Philip S Miller Park in Castle Rock on August 14th for the 16th Annual Reece’s Roundup 5K/10K. This event supports Reece Rubino in his fight against Spinal Muscular Atrophy.

$40

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 […]

Please click here to submit your event for FREE to our online calendar.
We do not allow events without physical locations (IE – virtual runs, runs with locations TBD, etc…).
Please allow 48 hours after submission for an event to appear on the calendar. If you have already listed your event and would like us to update it, please contact us.