The 2026 American Heroes Run has concluded.

American Heroes Run

Race complete
Longmont, CO, USA · September 12, 2026
clear-day52°·71° high·Breezy·Dry
8
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Weather
Course
FAQ
History

Race Day Weather

clear-day
52°at start
73° high
Breezy
Dry

Comfortable temps, big temp swing

Mild 52°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 73°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

clear-night8
clear-night8
clear-day8
clear-day9
clear-day9
clear-day9
clear-day9
clear-day8
clear-day8
partly-cloudy-day8
clear-day7

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Race Info

Website
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Course Map

Course Map Unavailable

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FAQ

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When is the 2026 American Heroes Run?

The 2026 American Heroes Run will be held on Saturday September 12, 2026.

What will the weather be like for the 2026 American Heroes Run?

The forecast calls for a high of 76°F and a low of 52°F with a 0% chance of rain.

Historical Weather

Based on 5 years of data
Avg Temp
80°F
L:51° H:80°
RunScore
7
Conditions
Rain Freq
20%
1 of 5 yrs
Wind5mph
Dew41°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults

2025 American Heroes Run

Clear conditions throughout the day.

2025
clear-day
45°/78°-
8

2024 American Heroes Run

Clear conditions throughout the day.

2024
clear-day
51°/86°-
8

2023 American Heroes Run

Clear conditions throughout the day.

2023
clear-day
55°/86°-
8

2022 American Heroes Run

Cloudy skies throughout the day with rain.

2022
cloudy
49°/54°Light
9

2021 American Heroes Run

Clear conditions throughout the day.

2021
clear-day
55°/97°-
7

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Free guidesMarathon Fueling Guide·Carb Loading Guide·Race Morning Guide·Race Day Gear Guide·Pacing Strategy Guide·Mental Strategy Guide

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