Event details subject to change. Please confirm all information via event website.
Colfax 5K
City Park - Denver 1700 N York St, Denver, CO, United StatesCome join over 21,000 runners from all over the world in the Mile High City! 2 Days, 8 Races means a distance for everyone! 26.2 Marathon through the stadium, fire station, […]
Colfax Marathon
City Park - Denver 1700 N York St, Denver, CO, United StatesCome join over 21,000 runners from all over the world in the Mile High City! 2 Days, 8 Races means a distance for everyone! 26.2 Marathon through the stadium, fire station, […]
North Fork Trail Race
BPIA Community Hall 18050 S. Buffalo Creek Road, Buffalo Creek, CO, United StatesThe North Fork 50 Mile/50K is 100% trails, mainly single track and some double track, starting and finishing along lovely Buffalo Creek, in the mountains about 50 miles southwest of […]
Harvest Moon Triathlon
Boulder Reservoir 5565 N 51st St, Boulder, CO, United StatesEst. in 2000 this Colorado classic provides the veterans to beginners a challenging, affordable, and competitive race with a local flavor. Whether this is your first event of the season, […]
Boulder Stroke & Stride I
Boulder Reservoir 5565 N 51st St, Boulder, CO, United StatesThe Boulder Stroke & Stride enters its 24th season in 2025, and offers Boulder area athletes a fun 1-lap 750 Meter Swim, or 2-lap 1500 Meter swim in Boulder Reservoir, […]
Summits Trail Runs
Granby Ranch 1000 Village Rd, Granby, CO, United StatesThe Summits Trail Runs occur at Granby Ranch Resort in Colorado’s beautiful Rocky Mountains. These challenging trail races offer a variety of distances ranging from shorter runs to ultra distances, […]
Colorado Triathlon
Boulder Reservoir 5565 N 51st St, Boulder, CO, United StatesThe Colorado Triathlon is where Colorado comes to race! The Colorado Triathlon - sprint & olympic distances, duathlon & aquabike options . To make this the "can't miss" event of […]
Colorado 13er
Home Depot 1200 Dillon Road Louisville CO 80027, Louisville, CO, United StatesThe Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and first-timers […]
Flamingo Day 5K
Sloan's Lake Park 1700 Utica Street, Denver, CO, United StatesJoin us for a fun and festive day at Denver's Sloan's Lake Park.
The 80’s Run
Highland Heritage Park 9651 S Quebec St, Highlands Ranch, CO, United StatesTHE 80s Are back! Are you ready? Then grab your old Nikes, Leg Warmers and Parachute Pants or SHORT shorts!
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