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November Trophy Series – 15Km and 5Km at Prairie Gateway Park
Part of RMRR's season-long scoring series
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All-Out Kooky-Spooky
Along Ralston Creek Trail past Arvada's Blunn Reservoir
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Rim Rock Marathon & Half Marathon
Sweeping canyon views along famous Rim Rock Drive in Colorado
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Bell Ringer 2-Miler
Loveland's Veterans Day bell-ringing tradition, on foot
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City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)
Rocky Mountain views over Denver's City Park lake
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Backcountry Wilderness Half Marathon
Singletrack through the Highlands Ranch Backcountry
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Colorado 24 Hour Run
Flat mile loop, run 6 to 24 hours at Swift Ponds
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Kessel Run Ultra
Singletrack past Colorado National Monument's high desert
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Denver Veterans Day Run
Known as 'Denver's Run for Veterans Day'
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Louisville Trail Race
Trail miles end with a Front Range mountain view
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TURKEY TREK (13.1, 10k, 5k & 2k)
Climbs a mesa summit, then an eggnog-chug challenge
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Pumpkin Pie 5K
Finish line pumpkin pie after a Denver 5K/10K
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Mile High United Way Turkey Trot
Denvers biggest Thanksgiving tradition through Washington Park
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Buena Vista Turkey Trot 5K
Flat course with views of the Collegiate Peaks
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Christmas Mountain 5 Mile Run
Send-off beneath Salida's lit-up Christmas Mountain
Save any of these to your season in RunCalendar and hear the morning entries open. Free on iPhone, no account needed.
Every race here is published by its organiser; RunCalendar checks the date and the entry window against the organiser's own page and rebuilds this calendar every night. A confirmed date shows its day; a provisional one shows only its month. Last updated 22 October 2026.