Colorado Half Marathon
Race Day Weather
Cold start — layer up, big temp swing, chance of rain
Runners will start in chilly 35°F conditions — dress in layers for the corral and plan to shed early. Temps will climb significantly to 55°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. There's a chance of rain, so have a backup gear plan ready.
Pace Calculator
Get forecast alerts for Colorado Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Colorado Half Marathon race plan
True Effort pacing, weather-adjusted mile splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.
Race Info
The Colorado Marathon's Half Marathon covers 13.1 miles starting near Gateway Natural Area in the Poudre Canyon and finishing in downtown Fort Collins. The point-to-point course drops more than 300 feet along the Poudre River Canyon before leveling out near Laporte, passing Picnic Rock Natural Area and the Low Hanging Fruit climbing area on the way to the finish.
