Event details subject to change. Please confirm all information via event website.
Desert’s Edge Triathlon
Highline Lake State Park 1800 11 8/10 Rd, Fruita, CO, United StatesJoin the Grand Junction Sports Commission for the 2025 Desert's Edge Triathlon Series. After a modified event in 2024, we are back with all of the usual race distances, at […]
Fall Equinox Marathon
Mishawaka Amphitheater 13714 Poudre Canyon Rd, Bellvue, CO 80512, Bellvue, CO, United StatesHeld on the Autumnal Equinox during the height of fall color, the Equinox Marathon, Half Marathon and 5-miles races are all point-to-point, net downhill, scenic courses along the Cache La Poudre River in Fort Collins. This year, the event will take place on September 18th.
Lead King Loop
Thompson Park Marble, CO, United StatesJoin us for a great day of running through the spectacular fall colors in the heart of the Elk Mountain Range. Run, walk, or hike the 25k loop around Lead King […]
Canceled Sloan’s Lake Search Party Marathon
Sloan's Lake Park 1700 Utica Street, Denver, CO, United StatesTHE SUMMARY Did you know that the loop around Sloan's Lake in Denver Colorado is almost perfectly 2.62 miles around? Join us as we go around the lake every hour on the […]
Nun Run Half Marathon
deKoevend Park 6315 S. University Blvd., Centennial, CO, United StatesDo you support life at all stages from conception until natural death? Do you believe every human being should be treated with the utmost dignity and the respect they deserve? […]
Canceled Pony Express Trail Run
Rampart Reservoir Rainbow Gulch Trailhead, Woodland Park, CO, United StatesThe Pony Express is a 16 mile trail run around Rampart Reservoir. Come out and enjoy the single track, running creeks, wildlife, and Colorado's autumn glory.
Spooky Sprint Half Marathon
Chatfield State Park 11500 N Roxborough Park Road, Littleton, CO, United StatesJoin us for the annual Spooky Sprint 5k/10k & Half Marathon! A fun, Halloween-themed event that is perfect for the whole family.
Colorado Run for the Fallen
Palmer Lake Regional Park 199 County Line Road, Palmer Lake, CO, United StatesJoin us at Palmer Lake Regional Recreation Area for the Annual Colorado Run for the Fallen—a 6-hour untimed run/walk/ruck hosted by the Honor and Remember – Colorado Chapter. This moving […]
El Grito 5K
Auraria Jordan Student Center 890 Auraria Pkwy, Denver, CO, United StatesEl Grito 5K (3.1 mile run & walk) on the Auraria Campus, start and finish at the Jordan Student Success Building including, a kids fun run and post race fiesta. […]
9/11 Heroes Run
Great Lawn Park 101 Yosemite St, Denver, CO, United StatesThe 9/11 Heroes Run is a 5k race honoring our heroes: those lost on September 11th and in the wars since, as well as the veterans, active duty, first responders, […]
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.