The 2026 American Heroes Run has concluded.
American Heroes Run
Race complete
Longmont, CO, USA · September 12, 2026
American Heroes Run race day weather
52°at start
73° high
Breezy
Dry
Cool start, warming trend ahead
Runners will face a temperature rise from 52°F at the start to a high of 71°F. Winds will be light from the ESE at 10 mph, posing minimal impact. With humidity at 57% and dew point at 45°F, hydration is key as temperatures increase; runners should adjust their pace conservatively to manage the warming conditions.
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Race weekend
Friday, September 11
10:10 AM6-Hour Open Start
10:11 AM100 Mile (100.0 mi)
4:11 PM24-Hour
Saturday, September 12
7:00 AM9 Hours & 11 Minutes
7:00 AMMarathon (26.2 mi)
8:46 AMHalf-Marathon (13.1 mi)9:03 AM9.11-Mile (9.1 mi)9:37 AM5K (3.1 mi)
American Heroes Run FAQ
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.
What is the weather usually like for the American Heroes Run?
Over the 8 years racecast.io has race-day weather for (2019 to 2026), it averaged 52°F at the start and 73°F by a typical finish. Rain fell during race hours in 1 of those years (2022).
What was the hottest American Heroes Run?
Of the 8 years on record, 2021 was the warmest, reaching 87°F during race hours. The coldest start was 2025, at 45°F.
What was the windiest American Heroes Run?
Of the 8 years on record, 2026 was the windiest, with wind averaging 4 mph during race hours. The calmest was 2021, at 1 mph.
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