Event details subject to change. Please confirm all information via event website.
Week of Events
Sunday, January 18, 2026
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January 18, 2026 -Colorado Cold Rush 5K/10K
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Featured January 18, 2026 -Featured Polar Bear 5K
Colorado Cold Rush 5K/10K
Baby, it's cold outside... And we're gonna take it on, because that's what living in Colorado is all about. Let's conquer the elements together at this WINTERY January 5k/10k race. We're staying cool in Colorado, one mile at a time! Starting at Louisville's Coal Creek Golf Course and running through neighborhoods, past fairways and along […]
Polar Bear 5K
The RunDenver Series is the original running series in Colorado and has been a staple for over three decades. Produced by HAL Sports, the series promises a fun time through those winter months, motivating you to stay, or get, active.
Monday, January 19, 2026
No events on this day.
Tuesday, January 20, 2026
No events on this day.
Wednesday, January 21, 2026
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January 21, 2026COPS 45 Minute Race
COPS 45 Minute Race
The Colorado Outdoor Pace Series ("C.O.P.S.") is a unique set of races presented by Golden Mountain Runners and Golden Endurance. Race Dates January 7, 2026 - 5K January 21, 2026 - 45 Minute Timed Race February 4, 2026 - 10K February 18, 2026 - 60 Minute Timed Race March 4, 2026 - 15K March 18, […]
Thursday, January 22, 2026
No events on this day.
Friday, January 23, 2026
No events on this day.
Saturday, January 24, 2026
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January 24, 2026 -Chilly Willy Half Marathon
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January 24, 2026 -PPRR Winter Series II
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January 24, 2026 -Polar Bear 5K
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January 24, 2026 -Rio Frio 5K
Chilly Willy Half Marathon
It's winter time & it's cold, but don't hibernate! Keep moving because it's a great time to go for a run whether you join us live or run virtual! We're racing the trails Cottonwood Creek Park. All the races start at 8:30 am, with Finisher Medals for everyone! Only 200 finisher medals will be ordered […]
PPRR Winter Series II
The series consists of four progressively longer (LONG AND SHORT) races. Please note: You must choose your distance when registering. The Long Race starts at 10:00AM. Short Race starts at 10:20AM. The courses are gravel/paved roads, packed double-track, and some single-track trails, which may or may not be snow-packed, icy, muddy, rocky, slushy, uphill and/or downhill. Altitude […]
Polar Bear 5K
Enjoy a beautiful run around the Horsetooth Reservoir with views of the Fort Collins Foothills. After your run, show how brave you are & take the dive into the icy reservoir water! Enjoy the after party with craft beer, overall and age group awards for the 5k, and local vendors!
Rio Frio 5K
The Annual Rio Frio 5K on Ice is one of America’s most unique 5k races! This spectacular event is conducted entirely on the majestic frozen Rio Grande! Have you ever run on a frozen river? Come and try it out on January 29th in Alamosa.
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